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Alternate Formats: rfc3585.txt | rfc3585.txt.pdf
RFC 3585 - IPsec Configuration Policy Information Model
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RFC3585 - IPsec Configuration Policy Information Model
Network Working Group J. Jason
Request for Comments: 3585 Intel Corporation
Category: Standards Track L. Rafalow
IBM
E. Vyncke
Cisco Systems
August 2003
IPsec Configuration Policy Information Model
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This document presents an object-oriented information model of IP
Security (IPsec) policy designed to facilitate agreement about the
content and semantics of IPsec policy, and enable derivations of
task-specific representations of IPsec policy such as storage schema,
distribution representations, and policy specification languages used
to configure IPsec-enabled endpoints. The information model
described in this document models the configuration parameters
defined by IPSec. The information model also covers the parameters
found by the Internet Key Exchange protocol (IKE). Other key
exchange protocols could easily be added to the information model by
a simple extension. Further extensions can further be added easily
due to the object-oriented nature of the model.
This information model is based upon the core policy classes as
defined in the Policy Core Information Model (PCIM) and in the Policy
Core Information Model Extensions (PCIMe).
Table of Contents
1. Introduction.................................................. 3
2. UML Conventions............................................... 4
3. IPsec Policy Model Inheritance Hierarchy...................... 6
4. Policy Classes................................................ 11
4.1. The Class SARule........................................ 13
4.2. The Class IKERule....................................... 17
4.3. The Class IPsecRule..................................... 18
4.4. The Association Class IPsecPolicyForEndpoint............ 18
4.5. The Association Class IPsecPolicyForSystem.............. 19
4.6. The Aggregation Class SAConditionInRule................. 19
4.7. The Aggregation Class PolicyActionInSARule.............. 20
5. Condition and Filter Classes.................................. 22
5.1. The Class SACondition................................... 23
5.2. The Class IPHeadersFilter............................... 23
5.3. The Class CredentialFilterEntry......................... 23
5.4. The Class IPSOFilterEntry............................... 25
5.5. The Class PeerIDPayloadFilterEntry...................... 26
5.6. The Association Class FilterOfSACondition............... 28
5.7. The Association Class AcceptCredentialFrom.............. 29
6. Action Classes................................................ 30
6.1. The Class SAAction...................................... 32
6.2. The Class SAStaticAction................................ 33
6.3. The Class IPsecBypassAction............................. 34
6.4. The Class IPsecDiscardAction............................ 34
6.5. The Class IKERejectAction............................... 35
6.6. The Class PreconfiguredSAAction......................... 35
6.7. The Class PreconfiguredTransportAction.................. 36
6.8. The Class PreconfiguredTunnelAction..................... 37
6.9. The Class SANegotiationAction........................... 37
6.10. The Class IKENegotiationAction.......................... 38
6.11. The Class IPsecAction................................... 39
6.12. The Class IPsecTransportAction.......................... 41
6.13. The Class IPsecTunnelAction............................. 42
6.14. The Class IKEAction..................................... 42
6.15. The Class PeerGateway................................... 44
6.16. The Association Class PeerGatewayForTunnel.............. 45
6.17. The Aggregation Class ContainedProposal................. 46
6.18. The Association Class HostedPeerGatewayInformation...... 47
6.19. The Association Class TransformOfPreconfiguredAction.... 48
6.20 The Association Class PeerGatewayForPreconfiguredTunnel. 49
7. Proposal and Transform Classes................................ 50
7.1. The Abstract Class SAProposal........................... 50
7.2. The Class IKEProposal................................... 51
7.3. The Class IPsecProposal................................. 54
7.4. The Abstract Class SATransform.......................... 54
7.5. The Class AHTransform................................... 56
7.6. The Class ESPTransform.................................. 57
7.7. The Class IPCOMPTransform............................... 59
7.8. The Association Class SAProposalInSystem................ 60
7.9. The Aggregation Class ContainedTransform................ 60
7.10. The Association Class SATransformInSystem............... 62
8. IKE Service and Identity Classes.............................. 63
8.1. The Class IKEService.................................... 64
8.2. The Class PeerIdentityTable............................. 64
8.3. The Class PeerIdentityEntry............................. 65
8.4. The Class AutostartIKEConfiguration..................... 66
8.5. The Class AutostartIKESetting........................... 67
8.6. The Class IKEIdentity................................... 69
8.7. The Association Class HostedPeerIdentityTable........... 71
8.8. The Aggregation Class PeerIdentityMember................ 71
8.9. The Association Class IKEServicePeerGateway............. 72
8.10. The Association Class IKEServicePeerIdentityTable....... 73
8.11. The Association Class IKEAutostartSetting............... 73
8.12. The Aggregation Class AutostartIKESettingContext........ 74
8.13. The Association Class IKEServiceForEndpoint............. 75
8.14. The Association Class IKEAutostartConfiguration......... 76
8.15. The Association Class IKEUsesCredentialManagementService 77
8.16. The Association Class EndpointHasLocalIKEIdentity....... 77
8.17. The Association Class CollectionHasLocalIKEIdentity..... 78
8.18. The Association Class IKEIdentitysCredential............ 79
9. Implementation Requirements................................... 79
10. Security Considerations....................................... 84
11. Intellectual Property Statement............................... 84
12. References ................................................... 85
12.1. Normative References.................................... 85
12.2. Informative References.................................. 86
13. Disclaimer.................................................... 86
14. Acknowledgments............................................... 86
15. Authors' Addresses............................................ 87
16. Full Copyright Statement...................................... 88
1. Introduction
IP security (IPsec) policy may assume a variety of forms as it
travels from storage, to distribution, to decision points. At each
step, it needs to be represented in a way that is convenient for the
current task. For example, the policy could exist as, but is not
limited to:
o A Lightweight Directory Access Protocol (LDAP) [LDAP] schema in a
directory.
o An on-the-wire representation over a transport protocol like the
Common Object Policy Service (COPS) [COPS, COPSPR].
o A text-based policy specification language suitable for editing by
an administrator.
o An Extensible Markup Language (XML) document.
Each of these task-specific representations should be derived from a
canonical representation that precisely specifies the content and
semantics of the IPsec policy. This document captures this concept
and introduces a task-independent canonical representation for IPsec
policies.
This document focuses mainly on the existing protocols [COMP, ESP,
AH, DOI, IKE]. The model can easily be extended if needed due to its
object-oriented nature.
This document is organized as follows:
o Section 2 provides a quick introduction to the Unified Modeling
Language (UML) graphical notation conventions used in this
document.
o Section 3 provides the inheritance hierarchy that describes where
the IPsec policy classes fit into the policy class hierarchy
already defined by the Policy Core Information Model (PCIM) and
Policy Core Information Model Extensions (PCIMe).
o Sections 4 through 8 describe the classes that make up the IPsec
policy model.
o Section 9 presents the implementation requirements for the classes
in the model (i.e., the MUST/MAY/SHOULD status).
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [KEYWORDS].
2. UML Conventions
For this document, a UML static class diagram was chosen as the
canonical representation for the IPsec policy model, because UML
provides a graphical, task-independent way to model systems. A
treatise on the graphical notation used in UML is beyond the scope of
this paper. However, given the use of ASCII drawing for UML static
class diagrams, a description of the notational conventions used in
this document is in order:
o Boxes represent classes, with class names in brackets ([])
representing an abstract class.
o A line that terminates with an arrow (<, >, ^, v) denotes
inheritance. The arrow always points to the parent class.
Inheritance can also be called generalization or specialization
(depending upon the reference point). A base class is a
generalization of a derived class, and a derived class is a
specialization of a base class.
o Associations are used to model a relationship between two classes.
Classes that share an association are connected using a line. A
special kind of association is also used: an aggregation. An
aggregation models a whole-part relationship between two classes.
Associations, and therefore aggregations, are also modeled as
classes.
o A line that begins with an "o" denotes aggregation. Aggregation
denotes containment in which the contained class and the
containing class have independent lifetimes.
o At each end of a line representing an association appears a
cardinality (i.e., each association has 2 cardinalities).
Cardinalities indicate the constraints on the number of object
instances in a set of relationships. The cardinality on a given
end of an association indicates the number of different object
instances of that class that may be associated with a single
object instance of the class on the other end of the association.
The cardinality may be:
- a range in the form "lower bound..upper bound" indicating the
minimum and maximum number of objects.
- a number that indicates the exact number of objects.
- an asterisk indicating any number of objects, including zero.
An asterisk is shorthand for 0..n.
- the letter n indicating from 1 to many. The letter n is
shorthand for 1..n.
o A class that has an association may have a "w" next to the line
representing the association. This is called a weak association
and is discussed in [PCIM].
It should be noted that the UML static class diagram presented is a
conceptual view of IPsec policy designed to aid in understanding. It
does not necessarily get translated class for class into another
representation. For example, an LDAP implementation may flatten out
the representation to fewer classes (because of the inefficiency of
following references).
3. IPsec Policy Model Inheritance Hierarchy
Like PCIM and PCIMe, the IPsec Configuration Policy Model derives
from and uses classes defined in the DMTF [DMTF] Common Information
Model (CIM). The following tree represents the inheritance hierarchy
for the IPsec Policy Model classes and how they fit into PCIM, PCIMe
and the other DMTF models (see Appendices for descriptions of classes
that are not being introduced as part of IPsec model). CIM classes
that are not used as a superclass to derive new classes, but are used
only as references, are not included in this inheritance hierarchy,
but can be found in the appropriate DMTF document: Core Model
[CIMCORE], User Model [CIMUSER] or, Network Model [CIMNETWORK].
ManagedElement (DMTF Core Model)
|
+--Collection (DMTF Core Model)
| |
| +--PeerIdentityTable
|
+--ManagedSystemElement (DMTF Core Model)
| |
| +--LogicalElement (DMTF Core Model)
| |
| +--FilterEntryBase (DMTF Network Model)
| | |
| | +--CredentialFilterEntry
| | |
| | +--IPHeadersFilter (PCIMe)
| | |
| | +--IPSOFilterEntry
| | |
| | +--PeerIDPayloadFilterEntry
| |
| +--PeerGateway
| |
| +--PeerIdentityEntry
| |
| +--Service (DMTF Core Model)
| |
| +--IKEService
|
+--OrganizationalEntity (DMTF User Model)
| |
| +--UserEntity (DMTF User Model)
| |
| +--UsersAccess (DMTF User Model)
| |
| +--IKEIdentity
|
+--Policy (PCIM)
| |
| +--PolicyAction (PCIM)
| | |
| | +--CompoundPolicyAction (PCIMe)
| | |
| | +--SAAction
| | |
| | +--SANegotiationAction
| | | |
| | | +--IKENegotiationAction
| | | |
| | | +--IKEAction
| | | |
| | | +--IPsecAction
| | | |
| | | +--IPsecTransportAction
| | | |
| | | +--IPsecTunnelAction
| | |
| | +--SAStaticAction
| | |
| | +--IKERejectAction
| | |
| | +--IPsecBypassAction
| | |
| | +--IPsecDiscardAction
| | |
| | +--PreconfiguredSAAction
| | |
| | +--PreconfiguredTransportAction
| | |
| | +--PreconfiguredTunnelAction
| |
| +--PolicyCondition (PCIM)
| | |
| | +--SACondition
| |
| +--PolicySet (PCIMe)
| | |
| | +--PolicyGroup (PCIM & PCIMe)
| | |
| | +--PolicyRule (PCIM & PCIMe)
| | |
| | +--SARule
| | |
| | +--IKERule
| | |
| | +--IPsecRule
| |
| +--SAProposal
| | |
| | +--IKEProposal
| | |
| | +--IPsecProposal
| |
| +--SATransform
| |
| +--AHTransform
| |
| +--ESPTransform
| |
| +--IPCOMPTransform
|
+--Setting (DMTF Core Model)
| |
| +--SystemSetting (DMTF Core Model)
| |
| +--AutostartIKESetting
|
+--SystemConfiguration (DMTF Core Model)
|
+--AutostartIKEConfiguration
The following tree represents the inheritance hierarchy of the IPsec
policy model association classes and how they fit into PCIM and the
other DMTF models (see Appendices for description of association
classes that are not being introduced as part of IPsec model).
Dependency (DMTF Core Model)
|
+--AcceptCredentialsFrom
|
+--ElementAsUser (DMTF User Model)
| |
| +--EndpointHasLocalIKEIdentity
| |
| +--CollectionHasLocalIKEIdentity
|
+--FilterOfSACondition
|
+--HostedPeerGatewayInformation
|
+--HostedPeerIdentityTable
|
+--IKEAutostartConfiguration
|
+--IKEServiceForEndpoint
|
+--IKEServicePeerGateway
|
+--IKEServicePeerIdentityTable
|
+--IKEUsesCredentialManagementService
|
+--IPsecPolicyForEndpoint
|
+--IPsecPolicyForSystem
|
+--PeerGatewayForPreconfiguredTunnel
|
+--PeerGatewayForTunnel
|
+--PolicyInSystem (PCIM)
| |
| +--SAProposalInSystem
| |
| +--SATransformInSystem
|
+--TransformOfPreconfiguredAction
|
+--UsersCredential (DMTF User Model)
|
+--IKEIdentitysCredential
ElementSetting (DMTF Core Model)
|
+--IKEAutostartSetting
MemberOfCollection (DMTF Core Model)
|
+--PeerIdentityMember
PolicyComponent (PCIM)
|
+--ContainedProposal
|
+--ContainedTransform
|
+--PolicyActionStructure (PCIMe)
| |
| +--PolicyActionInPolicyRule (PCIM & PCIMe)
| |
| +--PolicyActionInSARule
|
+--PolicyConditionStructure (PCIMe)
| |
| +--PolicyConditionInPolicyRule (PCIM & PCIMe)
| |
| +--SAConditionInRule
|
+--PolicySetComponent (PCIMe)
SystemSettingContext (DMTF Core Model)
|
+--AutostartIKESettingContext
4. Policy Classes
The IPsec policy classes represent the set of policies that are
contained on a system.
+--------------+
| [PolicySet] |*
| ([PCIME]) |o--+
+--------------+ |
^ *| |(a)
| +------+
+--------------------------+
| |
+-------------+ +--------------+
| PolicyGroup |0..1 | PolicyRule |*
| ([PCIM]) |-----+ | ([PCIM]) |o--+
+-------------+ | +--------------+ |(d)
0..1| | ^ |
|(b) | | |*
*| | | +---------------------------+
+--------------------+ |(c) | | PolicyTimePeriodCondition |
| IPProtocolEndpoint | | | | ([PCIM]) |
| ([CIMNETWORK]) | | | +---------------------------+
+--------------------+ | |
+------------+ | *+----------+*
| System |----+ +-o| SARule |o-------+
| ([CIMCORE])|* | +----------+ |(f)
+------------+ | ^ |
(e)| | |n
+-------------+n | | +--------------+
| SACondition |--------+ | |[PolicyAction]|
+-------------+ | | ([PCIM]) |
| +--------------+
| *| ^
| |(g) |
| | +-------+
| *o | |
| +----------------------+ |
| | CompoundPolicyAction | |
| | ([PCIME]) | |
| +----------------------+ |
| |
+---------+----+ +---------+
| | |
+---------+ +-----------+ +----------+
| IKERule | | IPsecRule | | SAAction |
+---------+ +-----------+ +----------+
(a) PolicySetComponent ([PCIME])
(b) IPsecPolicyForEndpoint
(c) IPsecPolicyForSystem
(d) PolicyRuleValidityPeriod ([PCIM])
(e) SAConditionInRule
(f) PolicyActionInSARule
(g) PolicyActionInPolicyAction ([PCIME])
A PolicyGroup represents the set of policies that are used on an
interface. This PolicyGroup SHOULD be associated either directly
with the IPProtocolEndpoint class instance that represents the
interface (via the IPsecPolicyForEndpoint association) or indirectly
(via the IPsecPolicyForSystem association) associated with the System
that hosts the interface.
The IKE and IPsec rules are used to build or to negotiate the IPsec
Security Association Database (SADB). The IPsec rules represent the
Security Policy Database. The SADB itself is not modeled by this
document.
The IKE and IPsec rules can be described as (also see section 6 about
actions):
o An egress unprotected packet will first be checked against the
IPsec rules. If a match is found, the SADB will be checked. If
there is no corresponding IPsec SA in the SADB, and if IKE
negotiation is required by the IPsec rule, the corresponding IKE
rules will be used. The negotiated or preconfigured SA will then
be installed in the SADB.
o An ingress unprotected packet will first be checked against the
IPsec rules. If a match is found, the SADB will be checked for a
corresponding IPsec SA. If there is no corresponding IPsec SA and
a preconfigured SA exists, this preconfigured SA will be installed
in the IPsec SADB. This behavior should only apply to bypass and
discard actions.
o An ingress protected packet will first be checked against the
IPsec rules. If a match is found, the SADB will be checked for a
corresponding IPsec SA. If there is no corresponding IPsec SA and
a preconfigured SA exists, this preconfigured SA will be installed
in the IPsec SADB.
o An ingress IKE negotiation packet, which is not part of an
existing IKE SA, will be checked against the IKE rules. The
SACondition for the IKERule will usually be composed of a
PeerIDPayloadFilterEntry (typically for an aggressive mode IKE
negotiation) or an IPHeadersFilter. The negotiated SA will then
be installed in the SADB.
It is expected that when an IKE negotiation is required to be
initiated by an IPsec rule, the set of IKE rules will be checked.
The IKE rules check will be based on the outgoing IKE packet using
IPHeadersFilter entries (typically using the HdrDstAddress property).
4.1. The Class SARule
The class SARule serves as a base class for IKERule and IPsecRule.
Even though the class is concrete, it MUST not be instantiated. It
defines a common connection point for associations to conditions and
actions for both types of rules. Through its derivation from
PolicyRule, an SARule (and therefore IKERule and IPsecRule) also has
the PolicyRuleValidityPeriod association.
Each SARule in a valid PolicyGroup MUST have a unique associated
priority number in the PolicySetComponent.Priority. The class
definition for SARule is as follows:
NAME SARule
DESCRIPTION A base class for IKERule and IPsecRule.
DERIVED FROM PolicyRule (see [PCIM] & [PCIME])
ABSTRACT FALSE
PROPERTIES PolicyRuleName (from PolicyRule)
Enabled (from PolicyRule)
ConditionListType (from PolicyRule)
RuleUsage (from PolicyRule)
Mandatory (from PolicyRule)
SequencedActions (from PolicyRule)
ExecutionStrategy (from PolicyRule)
PolicyRoles (from PolicySet)
PolicyDecisionStrategy (from PolicySet)
LimitNegotiation
4.1.1. The Properties PolicyRuleName, Enabled, ConditionListType,
RuleUsage, Mandatory, SequencedActions, PolicyRoles, and
PolicyDecisionStrategy
For a description of these properties, see [PCIM] and [PCIME].
In SARule subclass instances:
- if the property Mandatory exists, it MUST be set to "true".
- if the property SequencedActions exists, it MUST be set to
"mandatory".
- the property PolicyRoles is not used in the device-level model.
- if the property PolicyDecisionStrategy exists, it must be set to
"FirstMatching".
4.1.2. The Property ExecutionStrategy
The ExecutionStrategy properties in the PolicyRule subclasses (and in
the CompoundPolicyAction class) determine the behavior of the
contained actions. It defines the strategy to be used in executing
the sequenced actions aggregated by a rule or a compound action. In
the case of actions within a rule, the PolicyActionInSARule
aggregation is used to collect the actions into an ordered set; in
the case of a compound action, the PolicyActionInPolicyAction
aggregation is used to collect the actions into an ordered subset.
There are three execution strategies: do until success, do all, and
do until failure.
"Do Until Success" causes the execution of actions according to the
ActionOrder property in the aggregation instances until a successful
execution of a single action. These actions may be evaluated to
determine if they are appropriate to execute rather than blindly
trying each of the actions until one succeeds. For an initiator,
they are tried in the ActionOrder until the list is exhausted or one
completes successfully. For example, an IKE initiator may have
several IKEActions for the same SACondition. The initiator will try
all IKEActions in the order defined by ActionOrder. I.e., it will
possibly try several phase 1 negotiations with different modes (main
mode then aggressive mode) and/or with multiple IKE peers. For a
responder, when there is more than one action in the rule with "do
until success" condition clause, this provides alternative actions
depending on the received proposals. For example, the same IKERule
may be used to handle aggressive mode and main mode negotiations with
different actions. The responder uses the first appropriate action
in the list of actions.
"Do All" causes the execution of all the actions in the aggregated
set according to their defined order. The execution continues
regardless of failures.
"Do Until Failure" causes the execution of all actions according to a
predefined order until the first failure in execution of an action
instance. Please note that if all actions are successful, then the
aggregated result is a failure. This execution strategy is inherited
from [PCIME] and is not expected to be of any use for IPsec
configuration.
For example, in a nested SAs case, the actions of an initiator's rule
might be structured as:
IPsecRule.ExecutionStrategy='Do All'
|
+---1--- IPsecTunnelAction // set up SA from host to gateway
|
+---2--- IPsecTransportAction // set up SA from host through
// tunnel to remote host
Another example, showing a rule with fallback actions might be
structured as:
IPsecRule.ExecutionStrategy='Do Until Success'
|
+---6--- IPsecTransportAction // negotiate SA with peer
|
+---9--- IPsecBypassAction // but if you must, allow in the clear
The CompoundPolicyAction class (See [PCIME]) may be used in
constructing the actions of IKE and IPsec rules when those rules
specify both multiple actions and fallback actions. The
ExecutionStrategy property in CompoundPolicyAction is used in
conjunction with that in the PolicyRule.
For example, in nesting SAs with a fallback security gateway, the
actions of a rule might be structured as:
IPsecRule.ExecutionStrategy='Do All'
|
+---1--- CompoundPolicyAction.ExecutionStrategy='Do Until Success'
| |
| +---1--- IPsecTunnelAction // set up SA from host to
| | // gateway1
| |
| +---2--- IPsecTunnelAction // or set up SA to gateway2
|
+---2--- IPsecTransportAction // then set up SA from host
// through tunnel to remote
// host
In the case of "Do All", a couple of actions can be executed
successfully before a subsequent action fails. In this case, some
IKE or IPsec actions may have resulted in SAs creation. Even if the
net effect of the aggregated actions is failure, those created SAs
MAY be kept or MAY be deleted.
In the case of "Do All", the IPsec selectors to be used during IPsec
SA negotiation are:
- for the last IPsecAction of the aggregation (i.e., usually the
innermost IPsec SA): this is the combination of the
IPHeadersFilter class and of the Granularity property of the
IPsecAction.
- for all other IPsecActions of the aggregation: the selector is the
source IP address which is the local IP address, and the
destination IP address is the PeerGateway IP address of the
following IPsecAction of the "Do All" aggregation. NB: the
granularity is IP address to IP address.
If the above behavior is not desirable, the alternative is to define
several SARules, one for each IPsec SA to be built. This will allow
the definition of specific IPsec selectors for all IPsecActions.
4.1.3 The Property LimitNegotiation
The property LimitNegotiation is used as part of processing either an
IKE or an IPsec rule.
Before proceeding with a phase 1 negotiation, this property is
checked to determine whether the negotiation role of the rule matches
that defined for the negotiation being undertaken (e.g., Initiator,
Responder, or Both). If this check fails (e.g., the current role is
IKE responder, while the rule specifies IKE initiator), then the IKE
negotiation is stopped. Note that this only applies to new IKE phase
1 negotiations and has no effect on either renegotiation or refresh
operations with peers for which an established SA already exists.
Before proceeding with a phase 2 negotiation, the LimitNegotiation
property of the IPsecRule is first checked to determine if the
negotiation role indicated for the rule matches that of the current
negotiation (Initiator, Responder, or Either). Note that this limit
applies only to new phase 2 negotiations. It is ignored when an
attempt is made to refresh an expiring SA (either side can initiate a
refresh operation). The IKE system can determine that the
negotiation is a refresh operation by checking to see if the selector
information matches that of an existing SA. If LimitNegotiation does
not match and the selector corresponds to a new SA, the negotiation
is stopped.
The property is defined as follows:
NAME LimitNegotiation
DESCRIPTION Limits the role to be undertaken during negotiation.
SYNTAX unsigned 16-bit integer
VALUE 1 - initiator-only
2 - responder-only
3 - both
4.2. The Class IKERule
The class IKERule associates Conditions and Actions for IKE phase 1
negotiations. The class definition for IKERule is as follows:
NAME IKERule
DESCRIPTION Associates Conditions and Actions for IKE phase 1
negotiations.
DERIVED FROM SARule
ABSTRACT FALSE
PROPERTIES same as SARule, plus
IdentityContexts
4.2.1. The Property IdentityContexts
The IKE service of a security endpoint may have multiple identities
for use in different situations. The combination of the interface
(represented by the IPProtocolEndpoint or by a collection of
IPProtocolEndpoints), the identity type (as specified in the
IKEAction), and the IdentityContexts specifies a unique identity.
The IdentityContexts property specifies the context to select the
relevant IKE identity to be used during the further IKEAction. A
context may be a VPN name or other identifier for selecting the
appropriate identity for use on the protected IPProtocolEndpoint (or
collection of IPProtocolEndpoints).
IdentityContexts is an array of strings. The multiple values in the
array are logically ORed together in evaluating the IdentityContexts.
Each value in the array may be the composition of multiple context
names. So, a single value may be a single context name (e.g.,
"CompanyXVPN"), or it may be combination of contexts. When an array
value is a composition, the individual values are logically ANDed
together for evaluation purposes and the syntax is:
<ContextName>[&&<ContextName>]*
where the individual context names appear in alphabetical order
(according to the collating sequence for UCS-2). So, for example,
the values "CompanyXVPN", "CompanyYVPN&&TopSecret",
"CompanyZVPN&&Confidential" means that, for the appropriate
IPProtocolEndpoint and IdentityType, the contexts are matched if the
identity specifies "CompanyXVPN", "CompanyYVPN&&TopSecret", or
"CompanyZVPN&&Confidential".
The property is defined as follows:
NAME IdentityContexts
DESCRIPTION Specifies the context in which to select the IKE
identity.
SYNTAX string array
4.3. The Class IPsecRule
The class IPsecRule associates Conditions and Actions for IKE phase 2
negotiations for the IPsec DOI. The class definition for IPsecRule
is as follows:
NAME IPsecRule
DESCRIPTION Associates Conditions and Actions for IKE phase 2
negotiations for the IPsec DOI.
DERIVED FROM SARule
ABSTRACT FALSE
PROPERTIES same as SARule
4.4. The Association Class IPsecPolicyForEndpoint
The class IPsecPolicyForEndpoint associates a PolicyGroup with a
specific network interface. If an IPProtocolEndpoint of a system
does not have an IPsecPolicyForEndpoint-associated PolicyGroup, then
the IPsecPolicyForSystem associated PolicyGroup is used for that
endpoint. The class definition for IPsecPolicyForEndpoint is as
follows:
NAME IPsecPolicyForEndpoint
DESCRIPTION Associates a policy group to a network interface.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent[ref IPProtocolEndpoint[0..n]]
Dependent[ref PolicyGroup[0..1]]
4.4.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to an IPProtocolEndpoint instance. The [0..n]
cardinality indicates that a PolicyGroup instance may be associated
with zero or more IPProtocolEndpoint instances.
4.4.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a PolicyGroup instance. The [0..1] cardinality indicates
that an IPProtocolEndpoint instance may have an association to at
most one PolicyGroup instance.
4.5. The Association Class IPsecPolicyForSystem
The class IPsecPolicyForSystem associates a PolicyGroup with a
specific system. If an IPProtocolEndpoint of a system does not have
an IPsecPolicyForEndpoint-associated PolicyGroup, then the
IPsecPolicyForSystem associated PolicyGroup is used for that
endpoint. The class definition for IPsecPolicyForSystem is as
follows:
NAME IPsecPolicyForSystem
DESCRIPTION Default policy group for a system.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent[ref System[0..n]]
Dependent[ref PolicyGroup[0..1]]
4.5.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a System instance. The [0..n] cardinality
indicates that a PolicyGroup instance may have an association to zero
or more System instances.
4.5.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a PolicyGroup instance. The [0..1] cardinality indicates
that a System instance may have an association to at most one
PolicyGroup instance.
4.6. The Aggregation Class SAConditionInRule
The class SAConditionInRule associates an SARule with the SACondition
instance(s) that trigger(s) it. The class definition for
SAConditionInRule is as follows:
NAME SAConditionInRule
DESCRIPTION Associates an SARule with the SACondition instance(s)
that trigger(s) it.
DERIVED FROM PolicyConditionInPolicyRule (see [PCIM] & [PCIME])
ABSTRACT FALSE
PROPERTIES GroupNumber (from PolicyConditionInPolicyRule)
ConditionNegated (from PolicyConditionInPolicyRule)
GroupComponent [ref SARule [0..n]]
PartComponent [ref SACondition [1..n]]
4.6.1. The Properties GroupNumber and ConditionNegated
For a description of these properties, see [PCIM].
4.6.2. The Reference GroupComponent
The property GroupComponent is inherited from
PolicyConditionInPolicyRule and is overridden to refer to an SARule
instance. The [0..n] cardinality indicates that an SACondition
instance may be contained in zero or more SARule instances.
4.6.3. The Reference PartComponent
The property PartComponent is inherited from
PolicyConditionInPolicyRule and is overridden to refer to an
SACondition instance. The [1..n] cardinality indicates that an
SARule instance MUST contain at least one SACondition instance.
4.7. The Aggregation Class PolicyActionInSARule
The PolicyActionInSARule class associates an SARule with one or more
PolicyAction instances. In all cases where an SARule is being used,
the contained actions MUST be either subclasses of SAAction or
instances of CompoundPolicyAction. For an IKERule, the contained
actions MUST be related to phase 1 processing, i.e., IKEAction or
IKERejectAction. Similarly, for an IPsecRule, contained actions MUST
be related to phase 2 or preconfigured SA processing, e.g.,
IPsecTransportAction, IPsecBypassAction, etc. The class definition
for PolicyActionInSARule is as follows:
NAME PolicyActionInSARule
DESCRIPTION Associates an SARule with its PolicyAction(s).
DERIVED FROM PolicyActionInPolicyRule (see [PCIM] & [PCIME])
ABSTRACT FALSE
PROPERTIES GroupComponent [ref SARule [0..n]]
PartComponent [ref PolicyAction [1..n]]
ActionOrder (from PolicyActionInPolicyRule)
4.7.1. The Reference GroupComponent
The property GroupComponent is inherited from
PolicyActionInPolicyRule and is overridden to refer to an SARule
instance. The [0..n] cardinality indicates that an SAAction instance
may be contained in zero or more SARule instances.
4.7.2. The Reference PartComponent
The property PartComponent is inherited from PolicyActionInPolicyRule
and is overridden to refer to an SAAction or CompoundPolicyAction
instance. The [1..n] cardinality indicates that an SARule instance
MUST contain at least one SAAction or CompoundPolicyAction instance.
4.7.3. The Property ActionOrder
The property ActionOrder is inherited from the superclass
PolicyActionInPolicyRule. It specifies the relative position of this
PolicyAction in the sequence of actions associated with a PolicyRule.
The ActionOrder MUST be unique so as to provide a deterministic
order. In addition, the actions in an SARule are executed as
follows. See section 4.2.2, ExecutionStrategy, for a discussion on
the use of the ActionOrder property.
The property is defined as follows:
NAME ActionOrder
DESCRIPTION Specifies the order of actions.
SYNTAX unsigned 16-bit integer
VALUE Any value between 1 and 2^16-1 inclusive. Lower
values have higher precedence (i.e., 1 is the
highest precedence). The merging order of two
SAActions with the same precedence is undefined.
5. Condition and Filter Classes
The IPsec condition and filter classes are used to build the "if"
part of the IKE and IPsec rules.
*+-------------+
+--------------------| SACondition |
| +-------------+
| * |
| |(a)
| 1 |
| +---------------+
| | FilterList |
| |([CIMNETWORK]) |
| +---------------+
| 1 o
|(b) |(c)
| * |
| +-----------------+
| | FilterEntryBase |
| | ([CIMNETWORK]) |
| +-----------------+
| ^
| |
| +-----------------+ | +-----------------------+
| | IPHeadersFilter |----+----| CredentialFilterEntry |
| | ([PCIME]) | | +-----------------------+
| +-----------------+ |
| |
| +-----------------+ | +--------------------------+
| | IPSOFilterEntry |----+----| PeerIDPayloadFilterEntry |
| +-----------------+ +--------------------------+
|
| *+-----------------------------+
+------------| CredentialManagementService |
| ([CIMUSER]) |
+-----------------------------+
(a) FilterOfSACondition
(b) AcceptCredentialsFrom
(c) EntriesInFilterList (see [CIMNETWORK])
5.1. The Class SACondition
The class SACondition defines the conditions of rules for IKE and
IPsec negotiations. Conditions are associated with policy rules via
the SAConditionInRule aggregation. It is used as an anchor point to
associate various types of filters with policy rules via the
FilterOfSACondition association. It also defines whether Credentials
can be accepted for a particular policy rule via the
AcceptCredentialsFrom association.
Associated objects represent components of the condition that may or
may not apply at a given rule evaluation. For example, an
AcceptCredentialsFrom evaluation is only performed when a credential
is available to be evaluated against the list of trusted credential
management services. Similarly, a PeerIDPayloadFilterEntry may only
be evaluated when an IDPayload value is available to compare with the
filter. Condition components that do not have corresponding values
with which to evaluate are evaluated as TRUE unless the protocol has
completed without providing the required information.
The class definition for SACondition is as follows:
NAME SACondition
DESCRIPTION Defines the preconditions for IKE and IPsec
negotiations.
DERIVED FROM PolicyCondition (see [PCIM])
ABSTRACT FALSE
PROPERTIES PolicyConditionName (from PolicyCondition)
5.2. The Class IPHeadersFilter
The class IPHeadersFilter is defined in [PCIME] with the following
note:
1) to specify 5-tuple filters that are to apply symmetrically (i.e.,
matches traffic in both directions of the same flows which is
quite typical for SPD entries for ingress and egress traffic), the
Direction property of the FilterList SHOULD be set to "Mirrored".
5.3. The Class CredentialFilterEntry
The class CredentialFilterEntry defines an equivalence class that
match credentials of IKE peers. Each CredentialFilterEntry includes
a MatchFieldName that is interpreted according to the
CredentialManagementService(s) associated with the SACondition
(AcceptCredentialsFrom).
These credentials can be X.509 certificates, Kerberos tickets, or
other types of credentials obtained during the Phase 1 exchange.
Note: this filter entry will probably be checked while the IKE
negotiation takes place. If the check is a failure, then the IKE
negotiation MUST be stopped, and the result of the IKEAction which
triggered this negotiation is a failure.
The class definition for CredentialFilterEntry is as follows:
NAME CredentialFilterEntry
DESCRIPTION Specifies a match filter based on the IKE
credentials.
DERIVED FROM FilterEntryBase (see [CIMNETWORK])
ABSTRACT FALSE
PROPERTIES Name (from FilterEntryBase)
IsNegated (from FilterEntryBase)
MatchFieldName
MatchFieldValue
CredentialType
5.3.1. The Property MatchFieldName
The property MatchFieldName specifies the sub-part of the credential
to match against MatchFieldValue. The property is defined as
follows:
NAME MatchFieldName
DESCRIPTION Specifies which sub-part of the credential to match.
SYNTAX string
VALUE This is the string representation of a X.509
certificate attribute, e.g.:
- "serialNumber"
- "signatureAlgorithm"
- "issuerName"
- "subjectName"
- "subjectAltName"
- ...
5.3.2. The Property MatchFieldValue
The property MatchFieldValue specifies the value to compare with the
MatchFieldName in a credential to determine if the credential matches
this filter entry. The property is defined as follows:
NAME MatchFieldValue
DESCRIPTION Specifies the value to be matched by the
MatchFieldName.
SYNTAX string
VALUE NB: If the CredentialFilterEntry corresponds to a
DistinguishedName, this value in the CIM class is
represented by an ordinary string value. However, an
implementation must convert this string to a DER-
encoded string before matching against the values
extracted from credentials at runtime.
A wildcard mechanism may be used for MatchFieldNames that contain
character strings. The MatchFieldValue may contain a wildcard
character, '*', in the pattern match specification. For example, if
the MatchFieldName is "subjectName", then a MatchFieldValue of
"cn=*,ou=engineering,o=foo,c=be" will successfully match a
certificate whose subject attribute is "cn=Jane
Doe,ou=engineering,o=foo,c=be". The wildcard character can be used
to represent 0 or more characters as would be displayed to the user
(i.e., a wildcard pattern match operates on displayable character
boundaries).
5.3.3. The Property CredentialType
The property CredentialType specifies the particular type of
credential that is being matched. The property is defined as
follows:
NAME CredentialType
DESCRIPTION Defines the type of IKE credentials.
SYNTAX unsigned 16-bit integer
VALUE 1 - X.509 Certificate
2 - Kerberos Ticket
5.4. The Class IPSOFilterEntry
The class IPSOFilterEntry is used to match traffic based on the IP
Security Options [IPSO] header values (ClassificationLevel and
ProtectionAuthority) as defined in RFC 1108. This type of filter
entry is used to adjust the IPsec encryption level according to the
IPSO classification of the traffic (e.g., secret, confidential,
restricted, etc.) The class definition for IPSOFilterEntry is as
follows:
NAME IPSOFilterEntry
DESCRIPTION Specifies the a match filter based on IP Security
Options.
DERIVED FROM FilterEntryBase (see [CIMNETWORK])
ABSTRACT FALSE
PROPERTIES Name (from FilterEntryBase)
IsNegated (from FilterEntryBase)
MatchConditionType
MatchConditionValue
5.4.1. The Property MatchConditionType
The property MatchConditionType specifies the IPSO header field that
will be matched (e.g., traffic classification level or protection
authority). The property is defined as follows:
NAME MatchConditionType
DESCRIPTION Specifies the IPSO header field to be matched.
SYNTAX unsigned 16-bit integer
VALUE 1 - ClassificationLevel
2 - ProtectionAuthority
5.4.2. The Property MatchConditionValue
The property MatchConditionValue specifies the value of the IPSO
header field to be matched against. The property is defined as
follows:
NAME MatchConditionValue
DESCRIPTION Specifies the value of the IPSO header field to be
matched against.
SYNTAX unsigned 16-bit integer
VALUE The values MUST be one of values listed in RFC 1108
(or any further IANA Assigned Numbers document).
Some examples for ClassificationLevel are:
61 - TopSecret
90 - Secret
150 - Confidential
171 - Unclassified
For ProtectionAuthority, some examples are:
0 - GENSER
1 - SIOP-ESI
2 - SCI
3 - NSA
4 - DOE
5.5. The Class PeerIDPayloadFilterEntry
The class PeerIDPayloadFilterEntry defines filters used to match ID
payload values from the IKE protocol exchange.
PeerIDPayloadFilterEntry permits the specification of certain ID
payload values such as "*@example.com" or "192.0.2.0/24".
Obviously this filter applies only to IKERules when acting as a
responder. Moreover, this filter can be applied immediately in the
case of aggressive mode but its application is to be delayed in the
case of main mode. The class definition for PeerIDPayloadFilterEntry
is as follows:
NAME PeerIDPayloadFilterEntry
DESCRIPTION Specifies a match filter based on IKE identity.
DERIVED FROM FilterEntryBase (see [CIMNETWORK])
ABSTRACT FALSE
PROPERTIES Name (from FilterEntryBase)
IsNegated (from FilterEntryBase)
MatchIdentityType
MatchIdentityValue
5.5.1. The Property MatchIdentityType
The property MatchIdentityType specifies the type of identity
provided by the peer in the ID payload. The property is defined as
follows:
NAME MatchIdentityType
DESCRIPTION Specifies the ID payload type.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
5.5.2. The Property MatchIdentityValue
The property MatchIdentityValue specifies the filter value for
comparison with the ID payload, e.g., "*@example.com". The property
is defined as follows:
NAME MatchIdentityValue
DESCRIPTION Specifies the ID payload value.
SYNTAX string
VALUE NB: The syntax may need to be converted for
comparison. If the PeerIDPayloadFilterEntry type is
a DistinguishedName, the name in the
MatchIdentityValue property is represented by an
ordinary string value, but this value must be
converted into a DER-encoded string before matching
against the values extracted from IKE ID payloads at
runtime. The same applies to IPv4 & IPv6 addresses.
Different wildcard mechanisms can be used depending on the ID
payload:
- a MatchIdentityValue of "*@example.com" will match a user FQDN ID
payload of "JDOE@EXAMPLE.COM".
- a MatchIdentityValue of "*.example.com" will match a FQDN ID
payload of "WWW.EXAMPLE.COM".
- a MatchIdentityValue of "cn=*,ou=engineering,o=company,c=us" will
match a DER DN ID payload of "cn=John
Doe,ou=engineering,o=company,c=us".
- a MatchIdentityValue of "193.190.125.0/24" will match an IPv4
address ID payload of 193.190.125.10.
- a MatchIdentityValue of "193.190.125.*" will also match an IPv4
address ID payload of 193.190.125.10.
The above wildcard mechanisms MUST be supported for all ID payloads
supported by the local IKE entity. The character '*' replaces 0 or
multiple instances of any character as restricted by the type
specified by MatchIdentityType.
5.6. The Association Class FilterOfSACondition
The class FilterOfSACondition associates an SACondition with the
filter specifications (FilterList) that make up the condition. The
class definition for FilterOfSACondition is as follows:
NAME FilterOfSACondition
DESCRIPTION Associates a condition with the filter list that
makes up the individual condition elements.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent [ref FilterList[1..1]]
Dependent [ref SACondition[0..n]]
5.6.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a FilterList instance. The [1..1] cardinality
indicates that an SACondition instance MUST be associated with one
and only one FilterList instance.
5.6.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to an SACondition instance. The [0..n] cardinality
indicates that a FilterList instance may be associated with zero or
more SACondition instances.
5.7. The Association Class AcceptCredentialFrom
The class AcceptCredentialFrom specifies which credential management
services (e.g., a CertificateAuthority or a Kerberos service) are to
be trusted to certify peer credentials. This is used to assure that
the credential being matched in the CredentialFilterEntry is a valid
credential that has been supplied by an approved
CredentialManagementService. If a CredentialManagementService is
specified and a corresponding CredentialFilterEntry is used, but the
credential supplied by the peer is not certified by that
CredentialManagementService (or one of the
CredentialManagementServices in its trust hierarchy), the
CredentialFilterEntry is deemed not to match. If a credential is
certified by a CredentialManagementService in the
AcceptCredentialsFrom list of services, but there is no
CredentialFilterEntry, this is considered equivalent to a
CredentialFilterEntry that matches all credentials from those
services.
The class definition for AcceptCredentialFrom is as follows:
NAME AcceptCredentialFrom
DESCRIPTION Associates a condition with the credential management
services to be trusted.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent [ref CredentialManagementService[0..n]]
Dependent [ref SACondition[0..n]]
5.7.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a CredentialManagementService instance. The
[0..n] cardinality indicates that an SACondition instance may be
associated with zero or more CredentialManagementService instances.
5.7.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a SACondition instance. The [0..n] cardinality indicates
that a CredentialManagementService instance may be associated with
zero or more SACondition instances.
6. Action Classes
The action classes are used to model the different actions an IPsec
device may take when the evaluation of the associated condition
results in a match.
+----------+
| SAAction |
+----------+
^
|
+-----------+--------------+
| |
| +---------------------+
| | SaNegotiationAction |
| +---------------------+
| ^
| |
+----------------+ +----------------------+*
| SAStaticAction | | IKENegotiationAction |o----+
+----------------+ +----------------------+ |
^ ^ |
| | |
| +-----------+-------+ |
| | | |
+-------------------+ | +-------------+ +-----------+ |
| IPsecBypassAction |---+ | IPsecAction | | IKEAction | |
+-------------------+ | +-------------+ +-----------+ |
| ^ |
+--------------------+ | | +----------------------+ |
| IPsecDiscardAction |---+ +----| IPsecTransportAction | |
+--------------------+ | | +----------------------+ |
| | |
+-----------------+ | | +-------------------+ |
| IKERejectAction |---+ +----| IPsecTunnelAction | |
+-----------------+ | +-------------------+ |
| *| |
| +--------------+ |
| | |
+-----------------------+ | | +--------------+n |
| PreconfiguredSAAction |---+ |(a) | [SAProposal] |-------+
+-----------------------+ | +--------------+ (b)
*| ^ |
| | | *+-------------+
| | +-------| PeerGateway |
| | +-------------+
| | +-----------------------------+ |0..1 *w|
| +--| PreconfiguredTransportAction| | |(c)
| | +-----------------------------+ | 1|
| | | +--------------+
| | +---------------------------+ * | | System |
| +--| PreconfiguredTunnelAction |-----+ | ([CIMCORE]) |
| +---------------------------+ (e) +--------------+
|
| 2..6+---------------+
+-------| [SATransform] |
(d) +---------------+
(a) PeerGatewayForTunnel
(b) ContainedProposal
(c) HostedPeerGatewayInformation
(d) TransformOfPreconfiguredAction
(e) PeerGatewayForPreconfiguredTunnel
6.1. The Class SAAction
The class SAAction is abstract and serves as the base class for IKE
and IPsec actions. It is used for aggregating different types of
actions to IKE and IPsec rules. The class definition for SAAction is
as follows:
NAME SAAction
DESCRIPTION The base class for IKE and IPsec actions.
DERIVED FROM PolicyAction (see [PCIM])
ABSTRACT TRUE
PROPERTIES PolicyActionName (from PolicyAction)
DoActionLogging
DoPacketLogging
6.1.1. The Property DoActionLogging
The property DoActionLogging specifies whether a log message is to be
generated when the action is performed. This applies for
SANegotiationActions with the meaning of logging a message when the
negotiation is attempted (with the success or failure result). This
also applies for SAStaticAction only for PreconfiguredSAAction with
the meaning of logging a message when the preconfigured SA is
actually installed in the SADB. The property is defined as follows:
NAME DoActionLogging
DESCRIPTION Specifies the whether to log when the action is
performed.
SYNTAX boolean
VALUE true - a log message is to be generated when action
is performed.
false - no log message is to be generated when action
is performed.
6.1.2. The Property DoPacketLogging
The property DoPacketLogging specifies whether a log message is to be
generated when the resulting security association is used to process
the packet. If the SANegotiationAction successfully executes and
results in the creation of one or several security associations, or
if the PreconfiguredSAAction executes, the value of DoPacketLogging
SHOULD be propagated to an optional field of SADB. This optional
field should be used to decide whether a log message is to be
generated when the SA is used to process a packet. For
SAStaticActions, a log message is to be generated when the
IPsecBypassAction, IPsecDiscardAction, or IKERejectAction are
executed. The property is defined as follows:
NAME DoPacketLogging
DESCRIPTION Specifies whether to log when the resulting
security association is used to process the packet.
SYNTAX boolean
VALUE true - a log message is to be generated when the
resulting security association is used to process the
packet.
false - no log message is to be generated.
6.2. The Class SAStaticAction
The class SAStaticAction is abstract and serves as the base class for
IKE and IPsec actions that do not require any negotiation. The class
definition for SAStaticAction is as follows:
NAME SAStaticAction
DESCRIPTION The base class for IKE and IPsec actions that do not
require any negotiation.
DERIVED FROM SAAction
ABSTRACT TRUE
PROPERTIES LifetimeSeconds
6.2.1. The Property LifetimeSeconds
The property LifetimeSeconds specifies how long the security
association derived from this action should be used. The property is
defined as follows:
NAME LifetimeSeconds
DESCRIPTION Specifies the amount of time (in seconds) that a
security association derived from this action should
be used.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there is not a
lifetime associated with this action (i.e., infinite
lifetime). A non-zero value is typically used in
conjunction with alternate SAActions performed when
there is a negotiation failure of some sort.
Note: if the referenced SAStaticAction object is a
PreconfiguredSAAction associated to several SATransforms, then the
actual lifetime of the preconfigured SA will be the lesser of the
value of this LifetimeSeconds property and of the value of the
MaxLifetimeSeconds property of the associated SATransform. If the
value of this LifetimeSeconds property is zero, then there will be no
lifetime associated to this SA.
Note: while some SA negotiation protocols [IKE] can negotiate the
lifetime as an arbitrary length field, the authors have assumed that
a 64-bit integer will be sufficient.
It is expected that most SAStaticAction instances will have their
LifetimeSeconds properties set to zero (meaning no expiration of the
resulting SA).
6.3. The Class IPsecBypassAction
The class IPsecBypassAction is used when packets are allowed to be
processed without applying IPsec encapsulation to them. This is the
same as stating that packets are allowed to flow in the clear. The
class definition for IPsecBypassAction is as follows:
NAME IPsecBypassAction
DESCRIPTION Specifies that packets are to be allowed to pass in
the clear.
DERIVED FROM SAStaticAction
ABSTRACT FALSE
6.4. The Class IPsecDiscardAction
The class IPsecDiscardAction is used when packets are to be
discarded. This is the same as stating that packets are to be
denied. The class definition for IPsecDiscardAction is as follows:
NAME IPsecDiscardAction
DESCRIPTION Specifies that packets are to be discarded.
DERIVED FROM SAStaticAction
ABSTRACT FALSE
6.5. The Class IKERejectAction
The class IKERejectAction is used to prevent attempting an IKE
negotiation with the peer(s). The main use of this class is to
prevent some denial of service attacks when acting as IKE responder.
It goes beyond a plain discard of UDP/500 IKE packets because the
SACondition can be based on specific PeerIDPayloadFilterEntry (when
aggressive mode is used). The class definition for IKERejectAction
is as follows:
NAME IKERejectAction
DESCRIPTION Specifies that an IKE negotiation should not even be
attempted or continued.
DERIVED FROM SAStaticAction
ABSTRACT FALSE
6.6. The Class PreconfiguredSAAction
The class PreconfiguredSAAction is used to create a security
association using preconfigured, hard-wired algorithms and keys.
Notes:
- the SPI for a PreconfiguredSAAction is contained in the
association, TransformOfPreconfiguredAction;
- the session key (if applicable) is contained in an instance of the
class SharedSecret (see [CIMUSER]). The session key is stored in
the property Secret, the property protocol contains either "ESP-
encrypt", "ESP-auth" or "AH", the property algorithm contains the
algorithm used to protect the secret (can be "PLAINTEXT" if the
IPsec entity has no secret storage), the value of property
RemoteID is the concatenation of the remote IPsec peer IP address
in dotted decimal, of the character "/", of "IN" (respectively
"OUT") for inbound SA (respectively outbound SA), of the character
"/", and of the hexadecimal representation of the SPI.
Although the class is concrete, it MUST not be instantiated. The
class definition for PreconfiguredSAAction is as follows:
NAME PreconfiguredSAAction
DESCRIPTION Specifies preconfigured algorithm and keying
information for creation of a security association.
DERIVED FROM SAStaticAction
ABSTRACT TRUE
PROPERTIES LifetimeKilobytes
6.6.1. The Property LifetimeKilobytes
The property LifetimeKilobytes specifies a traffic limit in kilobytes
that can be consumed before the SA is deleted. The property is
defined as follows:
NAME LifetimeKilobytes
DESCRIPTION Specifies the SA lifetime in kilobytes.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there is not a
lifetime associated with this action (i.e., infinite
lifetime). A non-zero value is used to indicate that
after this number of kilobytes has been consumed the
SA must be deleted from the SADB.
Note: the actual lifetime of the preconfigured SA will be the lesser
of the value of this LifetimeKilobytes property and of the value of
the MaxLifetimeSeconds property of the associated SATransform. If
the value of this LifetimeKilobytes property is zero, then there will
be no lifetime associated with this action.
Note: while some SA negotiation protocols [IKE] can negotiate the
lifetime as an arbitrary length field, the authors have assumed that
a 64-bit integer will be sufficient.
It is expected that most PreconfiguredSAAction instances will have
their LifetimeKilobyte properties set to zero (meaning no expiration
of the resulting SA).
6.7. The Class PreconfiguredTransportAction
The class PreconfiguredTransportAction is used to create an IPsec
transport-mode security association using preconfigured, hard-wired
algorithms and keys. The class definition for
PreconfiguredTransportAction is as follows:
NAME PreconfiguredTransportAction
DESCRIPTION Specifies preconfigured algorithm and keying
information for creation of an IPsec transport
security association.
DERIVED FROM PreconfiguredSAAction
ABSTRACT FALSE
6.8. The Class PreconfiguredTunnelAction
The class PreconfiguredTunnelAction is used to create an IPsec
tunnel-mode security association using preconfigured, hard-wired
algorithms and keys. The class definition for PreconfiguredSAAction
is as follows:
NAME PreconfiguredTunnelAction
DESCRIPTION Specifies preconfigured algorithm and keying
information for creation of an IPsec tunnel-mode
security association.
DERIVED FROM PreconfiguredSAAction
ABSTRACT FALSE
PROPERTIES DFHandling
6.8.1. The Property DFHandling
The property DFHandling specifies how the Don't Fragment (DF) bit of
the internal IP header is to be handled during IPsec processing. The
property is defined as follows:
NAME DFHandling
DESCRIPTION Specifies the processing of the DF bit.
SYNTAX unsigned 16-bit integer
VALUE 1 - Copy the DF bit from the internal IP header to
the external IP header.
2 - Set the DF bit of the external IP header to 1.
3 - Clear the DF bit of the external IP header to 0.
6.9. The Class SANegotiationAction
The class SANegotiationAction specifies an action requesting security
policy negotiation.
This is an abstract class. Currently, only one security policy
negotiation protocol action is subclassed from SANegotiationAction:
the IKENegotiationAction class. It is nevertheless expected that
other security policy negotiation protocols will exist and the
negotiation actions of those new protocols would be modeled as a
subclass of SANegotiationAction.
NAME SANegotiationAction
DESCRIPTION Specifies a negotiation action.
DERIVED FROM SAAction
ABSTRACT TRUE
6.10. The Class IKENegotiationAction
The class IKENegotiationAction is abstract and serves as the base
class for IKE and IPsec actions that result in an IKE negotiation.
The class definition for IKENegotiationAction is as follows:
NAME IKENegotiationAction
DESCRIPTION A base class for IKE and IPsec actions that specifies
the parameters that are common for IKE phase 1 and
IKE phase 2 IPsec DOI negotiations.
DERIVED FROM SANegotiationAction
ABSTRACT TRUE
PROPERTIES MinLifetimeSeconds
MinLifetimeKilobytes
IdleDurationSeconds
6.10.1. The Property MinLifetimeSeconds
The property MinLifetimeSeconds specifies the minimum seconds in a
lifetime that will be accepted from the peer. MinLifetimeSeconds is
used to prevent certain denial of service attacks where the peer
requests an arbitrarily low lifetime value, causing renegotiations
with expensive Diffie-Hellman operations. The property is defined as
follows:
NAME MinLifetimeSeconds
DESCRIPTION Specifies the minimum seconds acceptable in a
lifetime.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there is no minimum
value. A non-zero value specifies the minimum
seconds lifetime.
Note: while IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
6.10.2. The Property MinLifetimeKilobytes
The property MinLifetimeKilobytes specifies the minimum kilobytes of
a lifetime that will be accepted from the peer. MinLifetimeKilobytes
is used to prevent certain denial of service attacks, where the peer
requests an arbitrarily low lifetime value, causing renegotiations
with correspondingly expensive Diffie-Hellman operations. Note that
there has been considerable debate regarding the usefulness of
applying kilobyte lifetimes to IKE phase 1 security associations, so
it is likely that this property will only apply to the sub-class
IPsecAction. The property is defined as follows:
NAME MinLifetimeKilobytes
DESCRIPTION Specifies the minimum kilobytes acceptable in a
lifetime.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there is no minimum
value. A non-zero value specifies the minimum
kilobytes lifetime.
Note: While IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
6.10.3. The Property IdleDurationSeconds
The property IdleDurationSeconds specifies how many seconds a
security association may remain idle (i.e., no traffic protected
using the security association) before it is deleted. The property
is defined as follows:
NAME IdleDurationSeconds
DESCRIPTION Specifies how long, in seconds, a security
association may remain unused before it is deleted.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that idle detection should
not be used for the security association (only the
seconds and kilobyte lifetimes will be used). Any
non-zero value indicates the number of seconds the
security association may remain unused.
6.11. The Class IPsecAction
The class IPsecAction serves as the base class for IPsec transport
and tunnel actions. It specifies the parameters used for an IKE
phase 2 IPsec DOI negotiation. The class definition for IPsecAction
is as follows:
NAME IPsecAction
DESCRIPTION A base class for IPsec transport and tunnel actions
that specifies the parameters for IKE phase 2 IPsec
DOI negotiations.
DERIVED FROM IKENegotiationAction
ABSTRACT TRUE
PROPERTIES UsePFS
UseIKEGroup
GroupId
Granularity
VendorID
6.11.1. The Property UsePFS
The property UsePFS specifies whether or not perfect forward secrecy
should be used when refreshing keys. The property is defined as
follows:
NAME UsePFS
DESCRIPTION Specifies the whether or not to use PFS when
refreshing keys.
SYNTAX boolean
VALUE A value of true indicates that PFS should be used. A
value of false indicates that PFS should not be used.
6.11.2. The Property UseIKEGroup
The property UseIKEGroup specifies whether or not phase 2 should use
the same key exchange group as was used in phase 1. UseIKEGroup is
ignored if UsePFS is false. The property is defined as follows:
NAME UseIKEGroup
DESCRIPTION Specifies whether or not to use the same GroupId for
phase 2 as was used in phase 1. If UsePFS is false,
then UseIKEGroup is ignored.
SYNTAX boolean
VALUE A value of true indicates that the phase 2 GroupId
should be the same as phase 1. A value of false
indicates that the property GroupId will contain the
key exchange group to use for phase 2.
6.11.3. The Property GroupId
The property GroupId specifies the key exchange group to use for
phase 2. GroupId is ignored if (1) the property UsePFS is false, or
(2) the property UsePFS is true and the property UseIKEGroup is true.
If the GroupID number is from the vendor-specific range (32768-
65535), the property VendorID qualifies the group number. The
property is defined as follows:
NAME GroupId
DESCRIPTION Specifies the key exchange group to use for phase 2
when the property UsePFS is true and the property
UseIKEGroup is false.
SYNTAX unsigned 16-bit integer
VALUE Consult [IKE] for valid values.
6.11.4. The Property Granularity
The property Granularity specifies how the selector for the security
association should be derived from the traffic that triggered the
negotiation. The property is defined as follows:
NAME Granularity
DESCRIPTION Specifies how the proposed selector for the
security association will be created.
SYNTAX unsigned 16-bit integer
VALUE 1 - subnet: the source and destination subnet masks
of the filter entry are used.
2 - address: only the source and destination IP
addresses of the triggering packet are used.
3 - protocol: the source and destination IP addresses
and the IP protocol of the triggering packet are
used.
4 - port: the source and destination IP addresses and
the IP protocol and the source and destination layer
4 ports of the triggering packet are used.
6.11.5. The Property VendorID
The property VendorID is used together with the property GroupID
(when it is in the vendor-specific range) to identify the key
exchange group. VendorID is ignored unless UsePFS is true and
UseIKEGroup is false and GroupID is in the vendor-specific range
(32768-65535). The property is defined as follows:
NAME VendorID
DESCRIPTION Specifies the IKE Vendor ID.
SYNTAX string
6.12. The Class IPsecTransportAction
The class IPsecTransportAction is a subclass of IPsecAction that is
used to specify use of an IPsec transport-mode security association.
The class definition for IPsecTransportAction is as follows:
NAME IPsecTransportAction
DESCRIPTION Specifies that an IPsec transport-mode security
association should be negotiated.
DERIVED FROM IPsecAction
ABSTRACT FALSE
6.13. The Class IPsecTunnelAction
The class IPsecTunnelAction is a subclass of IPsecAction that is used
to specify use of an IPsec tunnel-mode security association. The
class definition for IPsecTunnelAction is as follows:
NAME IPsecTunnelAction
DESCRIPTION Specifies that an IPsec tunnel-mode security
association should be negotiated.
DERIVED FROM IPsecAction
ABSTRACT FALSE
PROPERTIES DFHandling
6.13.1. The Property DFHandling
The property DFHandling specifies how the tunnel should manage the
Don't Fragment (DF) bit. The property is defined as follows:
NAME DFHandling
DESCRIPTION Specifies how to process the DF bit.
SYNTAX unsigned 16-bit integer
VALUE 1 - Copy the DF bit from the internal IP header to
the external IP header.
2 - Set the DF bit of the external IP header to 1.
3 - Clear the DF bit of the external IP header to 0.
6.14. The Class IKEAction
The class IKEAction specifies the parameters that are to be used for
IKE phase 1 negotiation. The class definition for IKEAction is as
follows:
NAME IKEAction
DESCRIPTION Specifies the IKE phase 1 negotiation parameters.
DERIVED FROM IKENegotiationAction
ABSTRACT FALSE
PROPERTIES ExchangeMode
UseIKEIdentityType
VendorID
AggressiveModeGroupId
6.14.1. The Property ExchangeMode
The property ExchangeMode specifies which IKE mode should be used for
IKE phase 1 negotiations. The property is defined as follows:
NAME ExchangeMode
DESCRIPTION Specifies the IKE negotiation mode for phase 1.
SYNTAX unsigned 16-bit integer
VALUE 1 - base mode
2 - main mode
4 - aggressive mode
6.14.2. The Property UseIKEIdentityType
The property UseIKEIdentityType specifies what IKE identity type
should be used when negotiating with the peer. This information is
used in conjunction with the IKE identities available on the system
and the IdentityContexts of the matching IKERule. The property is
defined as follows:
NAME UseIKEIdentityType
DESCRIPTION Specifies the IKE identity to use during negotiation.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
6.14.3. The Property VendorID
The property VendorID specifies the value to be used in the Vendor ID
payload. The property is defined as follows:
NAME VendorID
DESCRIPTION Vendor ID Payload.
SYNTAX string
VALUE A value of NULL means that Vendor ID payload will be
neither generated nor accepted. A non-NULL value
means that a Vendor ID payload will be generated
(when acting as an initiator) or is expected (when
acting as a responder).
6.14.4. The Property AggressiveModeGroupId
The property AggressiveModeGroupId specifies which group ID is to be
used in the first packets of the phase 1 negotiation. This property
is ignored unless the property ExchangeMode is set to 4 (aggressive
mode). If the AggressiveModeGroupID number is from the vendor-
specific range (32768-65535), the property VendorID qualifies the
group number. The property is defined as follows:
NAME AggressiveModeGroupId
DESCRIPTION Specifies the group ID to be used for aggressive
mode.
SYNTAX unsigned 16-bit integer
6.15. The Class PeerGateway
The class PeerGateway specifies the security gateway with which the
IKE services negotiates. The class definition for PeerGateway is as
follows:
NAME PeerGateway
DESCRIPTION Specifies the security gateway with which to
negotiate.
DERIVED FROM LogicalElement (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Name
PeerIdentityType
PeerIdentity
Note: The class PeerIdentityEntry contains more information about the
peer (namely its IP address).
6.15.1. The Property Name
The property Name specifies a user-friendly name for this security
gateway. The property is defined as follows:
NAME Name
DESCRIPTION Specifies a user-friendly name for this security
gateway.
SYNTAX string
6.15.2. The Property PeerIdentityType
The property PeerIdentityType specifies the IKE identity type of the
security gateway. The property is defined as follows:
NAME PeerIdentityType
DESCRIPTION Specifies the IKE identity type of the security
gateway.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
6.15.3. The Property PeerIdentity
The property PeerIdentity specifies the IKE identity value of the
security gateway. Based upon the storage chosen for the task-
specific mapping of the information model, a conversion may be needed
from the stored representation of the PeerIdentity string to the real
value used in the ID payload (e.g., IP address is to be converted
from a dotted decimal string into 4 bytes). The property is defined
as follows:
NAME PeerIdentity
DESCRIPTION Specifies the IKE identity value of the security
gateway.
SYNTAX string
6.16. The Association Class PeerGatewayForTunnel
The class PeerGatewayForTunnel associates IPsecTunnelActions with an
ordered list of PeerGateways. The class definition for
PeerGatewayForTunnel is as follows:
NAME PeerGatewayForTunnel
DESCRIPTION Associates IPsecTunnelActions with an ordered list of
PeerGateways.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent [ref PeerGateway[0..n]]
Dependent [ref IPsecTunnelAction[0..n]]
SequenceNumber
6.16.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a PeerGateway instance. The [0..n]
cardinality indicates that an IPsecTunnelAction instance may be
associated with zero or more PeerGateway instances.
Note: The cardinality 0 has a specific meaning:
- when the IKE service acts as a responder, this means that the IKE
service will accept phase 1 negotiation with any other security
gateway;
- when the IKE service acts as an initiator, this means that the IKE
service will use the destination IP address (of the IP packets
which triggered the SARule) as the IP address of the peer IKE
entity.
6.16.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to an IPsecTunnelAction instance. The [0..n] cardinality
indicates that a PeerGateway instance may be associated with zero or
more IPsecTunnelAction instances.
6.16.3. The Property SequenceNumber
The property SequenceNumber specifies the ordering to be used when
evaluating PeerGateway instances for a given IPsecTunnelAction. The
property is defined as follows:
NAME SequenceNumber
DESCRIPTION Specifies the order of evaluation for PeerGateways.
SYNTAX unsigned 16-bit integer
VALUE Lower values are evaluated first.
6.17. The Aggregation Class ContainedProposal
The class ContainedProposal associates an ordered list of SAProposals
with the IKENegotiationAction that aggregates it. If the referenced
IKENegotiationAction object is an IKEAction, then the referenced
SAProposal object(s) must be IKEProposal(s). If the referenced
IKENegotiationAction object is an IPsecTransportAction or an
IPsecTunnelAction, then the referenced SAProposal object(s) must be
IPsecProposal(s). The class definition for ContainedProposal is as
follows:
NAME ContainedProposal
DESCRIPTION Associates an ordered list of SAProposals with an
IKENegotiationAction.
DERIVED FROM PolicyComponent (see [PCIM])
ABSTRACT FALSE
PROPERTIES GroupComponent[ref IKENegotiationAction[0..n]]
PartComponent[ref SAProposal[1..n]]
SequenceNumber
6.17.1. The Reference GroupComponent
- The property GroupComponent is inherited from PolicyComponent and
is overridden to refer to an IKENegotiationAction instance. The
[0..n] cardinality indicates that an SAProposal instance may be
associated with zero or more IKENegotiationAction instances.
6.17.2. The Reference PartComponent
The property PartComponent is inherited from PolicyComponent and is
overridden to refer to an SAProposal instance. The [1..n]
cardinality indicates that an IKENegotiationAction instance MUST be
associated with at least one SAProposal instance.
6.17.3. The Property SequenceNumber
The property SequenceNumber specifies the order of preference for the
SAProposals. The property is defined as follows:
NAME SequenceNumber
DESCRIPTION Specifies the preference order for the SAProposals.
SYNTAX unsigned 16-bit integer
VALUE Lower-valued proposals are preferred over proposals
with higher values. For ContainedProposals that
reference the same IKENegotiationAction,
SequenceNumber values must be unique.
6.18. The Association Class HostedPeerGatewayInformation
The class HostedPeerGatewayInformation weakly associates a
PeerGateway with a System. The class definition for
HostedPeerGatewayInformation is as follows:
NAME HostedPeerGatewayInformation
DESCRIPTION Weakly associates a PeerGateway with a System.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent [ref System[1..1]]
Dependent [ref PeerGateway[0..n] [weak]]
6.18.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a System instance. The [1..1] cardinality
indicates that a PeerGateway instance MUST be associated with one and
only one System instance.
6.18.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a PeerGateway instance. The [0..n] cardinality indicates
that a System instance may be associated with zero or more
PeerGateway instances.
6.19. The Association Class TransformOfPreconfiguredAction
The class TransformOfPreconfiguredAction associates a
PreconfiguredSAAction with two, four or six SATransforms that will be
applied to the inbound and outbound traffic. The order of
application of the SATransforms is implicitly defined in [IPSEC].
The class definition for TransformOfPreconfiguredAction is as
follows:
NAME TransformOfPreconfiguredAction
DESCRIPTION Associates a PreconfiguredSAAction with from one to
three SATransforms.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent[ref SATransform[2..6]]
Dependent[ref PreconfiguredSAAction[0..n]]
SPI
Direction
6.19.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to an SATransform instance. The [2..6]
cardinality indicates that a PreconfiguredSAAction instance may be
associated with two to six SATransform instances.
6.19.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a PreconfiguredSAAction instance. The [0..n] cardinality
indicates that a SATransform instance may be associated with zero or
more PreconfiguredSAAction instances.
6.19.3. The Property SPI
The property SPI specifies the SPI to be used by the pre-configured
action for the associated transform. The property is defined as
follows:
NAME SPI
DESCRIPTION Specifies the SPI to be used with the SATransform.
SYNTAX unsigned 32-bit integer
6.19.4. The Property Direction
The property Direction specifies whether the SPI property is for
inbound or outbound traffic. The property is defined as follows:
NAME Direction
DESCRIPTION Specifies whether the SA is for inbound or outbound
traffic.
SYNTAX unsigned 8-bit integer
VALUE 1 - this SA is for inbound traffic
2 - this SA is for outbound traffic
6.20 The Association Class PeerGatewayForPreconfiguredTunnel
The class PeerGatewayForPreconfiguredTunnel associates zero or one
PeerGateways with multiple PreconfiguredTunnelActions. The class
definition for PeerGatewayForPreconfiguredTunnel is as follows:
NAME PeerGatewayForPreconfiguredTunnel
DESCRIPTION Associates a PeerGateway with multiple
PreconfiguredTunnelActions.
DERIVED FROM Dependency (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Antecedent[ref PeerGateway[0..1]]
Dependent[ref PreconfiguredTunnelAction[0..n]]
6.20.1. The Reference Antecedent
The property Antecedent is inherited from Dependency and is
overridden to refer to a PeerGateway instance. The [0..1]
cardinality indicates that a PreconfiguredTunnelAction instance may
be associated with one PeerGteway instance.
6.20.2. The Reference Dependent
The property Dependent is inherited from Dependency and is overridden
to refer to a PreconfiguredTunnelAction instance. The [0..n]
cardinality indicates that a PeerGateway instance may be associated
with zero or more PreconfiguredSAAction instances.
7. Proposal and Transform Classes
The proposal and transform classes model the proposal settings an
IPsec device will use during IKE phase 1 and 2 negotiations.
+--------------+*w 1+--------------+
| [SAProposal] |--------| System |
+--------------+ (a) | ([CIMCORE]) |
^ +--------------+
| |1
+----------------------+ |
| | |
+-------------+ +---------------+ |
| IKEProposal | | IPsecProposal | |
+-------------+ +---------------+ |
*o |
|(b) |(c)
n| |
+---------------+*w |
| [SATransform] |----+
+---------------+
^
|
+--------------------+-----------+---------+
| | |
+-------------+ +--------------+ +----------------+
| AHTransform | | ESPTransform | |IPCOMPTransform |
+-------------+ +--------------+ +----------------+
(a) SAProposalInSystem
(b) ContainedTransform
(c) SATransformInSystem
7.1. The Abstract Class SAProposal
The abstract class SAProposal serves as the base class for the IKE
and IPsec proposal classes. It specifies the parameters that are
common to the two proposal types. The class definition for
SAProposal is as follows:
NAME SAProposal
DESCRIPTION Specifies the common proposal parameters for IKE and
IPsec security association negotiation.
DERIVED FROM Policy ([PCIM])
ABSTRACT TRUE
PROPERTIES Name
7.1.1. The Property Name
The property Name specifies a user-friendly name for the SAProposal.
The property is defined as follows:
NAME Name
DESCRIPTION Specifies a user-friendly name for this proposal.
SYNTAX string
7.2. The Class IKEProposal
The class IKEProposal specifies the proposal parameters necessary to
drive an IKE security association negotiation. The class definition
for IKEProposal is as follows:
NAME IKEProposal
DESCRIPTION Specifies the proposal parameters for IKE security
association negotiation.
DERIVED FROM SAProposal
ABSTRACT FALSE
PROPERTIES CipherAlgorithm
HashAlgorithm
PRFAlgorithm
GroupId
AuthenticationMethod
MaxLifetimeSeconds
MaxLifetimeKilobytes
VendorID
7.2.1. The Property CipherAlgorithm
The property CipherAlgorithm specifies the proposed phase 1 security
association encryption algorithm. The property is defined as
follows:
NAME CipherAlgorithm
DESCRIPTION Specifies the proposed encryption algorithm for the
phase 1 security association.
SYNTAX unsigned 16-bit integer
VALUE Consult [IKE] for valid values.
7.2.2. The Property HashAlgorithm
The property HashAlgorithm specifies the proposed phase 1 security
association hash algorithm. The property is defined as follows:
NAME HashAlgorithm
DESCRIPTION Specifies the proposed hash algorithm for the phase 1
security association.
SYNTAX unsigned 16-bit integer
VALUE Consult [IKE] for valid values.
7.2.3. The Property PRFAlgorithm
The property PRFAlgorithm specifies the proposed phase 1 security
association pseudo-random function. The property is defined as
follows:
NAME PRFAlgorithm
DESCRIPTION Specifies the proposed pseudo-random function for the
phase 1 security association.
SYNTAX unsigned 16-bit integer
VALUE Currently none defined in [IKE], if [IKE, DOI] are
extended, then the values of [IKE, DOI] are to be
used for values of PRFAlgorithm.
7.2.4. The Property GroupId
The property GroupId specifies the proposed phase 1 security
association key exchange group. This property is ignored for all
aggressive mode exchanges. If the GroupID number is from the
vendor-specific range (32768-65535), the property VendorID qualifies
the group number. The property is defined as follows:
NAME GroupId
DESCRIPTION Specifies the proposed key exchange group for the
phase 1 security association.
SYNTAX unsigned 16-bit integer
VALUE Consult [IKE] for valid values.
Note: The value of this property is to be ignored in aggressive mode.
7.2.5. The Property AuthenticationMethod
The property AuthenticationMethod specifies the proposed phase 1
authentication method. The property is defined as follows:
NAME AuthenticationMethod
DESCRIPTION Specifies the proposed authentication method for the
phase 1 security association.
SYNTAX unsigned 16-bit integer
VALUE 0 - a special value that indicates that this
particular proposal should be repeated once for each
authentication method that corresponds to the
credentials installed on the machine. For example,
if the system has a pre-shared key and a certificate,
a proposal list could be constructed that includes a
proposal that specifies a pre-shared key and
proposals for any of the public-key authentication
methods. Consult [IKE] for valid values.
7.2.6. The Property MaxLifetimeSeconds
The property MaxLifetimeSeconds specifies the proposed maximum time,
in seconds, that a security association will remain valid after its
creation. The property is defined as follows:
NAME MaxLifetimeSeconds
DESCRIPTION Specifies the proposed maximum time that a
security association will remain valid.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that the default of 8
hours be used. A non-zero value indicates the
maximum seconds lifetime.
Note: While IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
7.2.7. The Property MaxLifetimeKilobytes
The property MaxLifetimeKilobytes specifies the proposed maximum
kilobyte lifetime that a security association will remain valid after
its creation. The property is defined as follows:
NAME MaxLifetimeKilobytes
DESCRIPTION Specifies the proposed maximum kilobyte lifetime
that a security association will remain valid.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there should be no
maximum kilobyte lifetime. A non-zero value
specifies the desired kilobyte lifetime.
Note: While IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
7.2.8. The Property VendorID
The property VendorID further qualifies the key exchange group. The
property is ignored unless the exchange is not in aggressive mode and
the property GroupID is in the vendor-specific range. The property
is defined as follows:
NAME VendorID
DESCRIPTION Specifies the Vendor ID to further qualify the key
exchange group.
SYNTAX string
7.3. The Class IPsecProposal
The class IPsecProposal adds no new properties, but inherits proposal
properties from SAProposal, as well as aggregating the security
association transforms necessary for building an IPsec proposal (see
the aggregation class ContainedTransform). The class definition for
IPsecProposal is as follows:
NAME IPsecProposal
DESCRIPTION Specifies the proposal parameters for IPsec security
association negotiation.
DERIVED FROM SAProposal
ABSTRACT FALSE
7.4. The Abstract Class SATransform
The abstract class SATransform serves as the base class for the IPsec
transforms that can be used to compose an IPsec proposal or to be
used as a pre-configured action. The class definition for
SATransform is as follows:
NAME SATransform
DESCRIPTION Base class for the different IPsec transforms.
ABSTRACT TRUE
PROPERTIES CommonName (from Policy)
VendorID
MaxLifetimeSeconds
MaxLifetimeKilobytes
7.4.1. The Property CommonName
The property CommonName is inherited from Policy [PCIM] and specifies
a user-friendly name for the SATransform. The property is defined as
follows:
NAME CommonName
DESCRIPTION Specifies a user-friendly name for this Policy-
related object.
SYNTAX string
7.4.2. The Property VendorID
The property VendorID specifies the vendor ID for vendor-defined
transforms. The property is defined as follows:
NAME VendorID
DESCRIPTION Specifies the vendor ID for vendor-defined
transforms.
SYNTAX string
VALUE An empty VendorID string indicates that the transform
is a standard one.
7.4.3. The Property MaxLifetimeSeconds
The property MaxLifetimeSeconds specifies the proposed maximum time,
in seconds, that a security association will remain valid after its
creation. The property is defined as follows:
NAME MaxLifetimeSeconds
DESCRIPTION Specifies the proposed maximum time that a
security association will remain valid.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that the default of 8 hours
be used. A non-zero value indicates the maximum
seconds lifetime.
Note: While IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
7.4.4. The Property MaxLifetimeKilobytes
The property MaxLifetimeKilobytes specifies the proposed maximum
kilobyte lifetime that a security association will remain valid after
its creation. The property is defined as follows:
NAME MaxLifetimeKilobytes
DESCRIPTION Specifies the proposed maximum kilobyte lifetime
that a security association will remain valid.
SYNTAX unsigned 64-bit integer
VALUE A value of zero indicates that there should be no
maximum kilobyte lifetime. A non-zero value
specifies the desired kilobyte lifetime.
Note: While IKE can negotiate the lifetime as an arbitrary length
field, the authors have assumed that a 64-bit integer will be
sufficient.
7.5. The Class AHTransform
The class AHTransform specifies the AH algorithm to propose during
IPsec security association negotiation. The class definition for
AHTransform is as follows:
NAME AHTransform
DESCRIPTION Specifies the proposed AH algorithm.
ABSTRACT FALSE
PROPERTIES AHTransformId
UseReplayPrevention
ReplayPreventionWindowSize
7.5.1. The Property AHTransformId
The property AHTransformId specifies the transform ID of the AH
algorithm. The property is defined as follows:
NAME AHTransformId
DESCRIPTION Specifies the transform ID of the AH algorithm.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
7.5.2. The Property UseReplayPrevention
The property UseReplayPrevention specifies whether replay prevention
detection is to be used. The property is defined as follows:
NAME UseReplayPrevention
DESCRIPTION Specifies whether to enable replay prevention
detection.
SYNTAX boolean
VALUE true - replay prevention detection is enabled.
false - replay prevention detection is disabled.
7.5.3. The Property ReplayPreventionWindowSize
The property ReplayPreventionWindowSize specifies, in bits, the
length of the sliding window used by the replay prevention detection
mechanism. The value of this property is meaningless if
UseReplayPrevention is false. It is assumed that the window size
will be power of 2. The property is defined as follows:
NAME ReplayPreventionWindowSize
DESCRIPTION Specifies the length of the window used by the replay
prevention detection mechanism.
SYNTAX unsigned 32-bit integer
7.6. The Class ESPTransform
The class ESPTransform specifies the ESP algorithms to propose
during IPsec security association negotiation. The class definition
for ESPTransform is as follows:
NAME ESPTransform
DESCRIPTION Specifies the proposed ESP algorithms.
ABSTRACT FALSE
PROPERTIES IntegrityTransformId
CipherTransformId
CipherKeyLength
CipherKeyRounds
UseReplayPrevention
ReplayPreventionWindowSize
7.6.1. The Property IntegrityTransformId
The property IntegrityTransformId specifies the transform ID of the
ESP integrity algorithm. The property is defined as follows:
NAME IntegrityTransformId
DESCRIPTION Specifies the transform ID of the ESP integrity
algorithm.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
7.6.2. The Property CipherTransformId
The property CipherTransformId specifies the transform ID of the ESP
encryption algorithm. The property is defined as follows:
NAME CipherTransformId
DESCRIPTION Specifies the transform ID of the ESP encryption
algorithm.
SYNTAX unsigned 16-bit integer
VALUE Consult [DOI] for valid values.
7.6.3. The Property CipherKeyLength
The property CipherKeyLength specifies, in bits, the key length for
the ESP encryption algorithm. For encryption algorithms that use a
fixed-length keys, this value is ignored. The property is defined as
follows:
NAME CipherKeyLength
DESCRIPTION Specifies the ESP encryption key length in bits.
SYNTAX unsigned 16-bit integer
7.6.4. The Property CipherKeyRounds
The property CipherKeyRounds specifies the number of key rounds for
the ESP encryption algorithm. For encryption algorithms that use
fixed number of key rounds, this value is ignored. The property is
defined as follows:
NAME CipherKeyRounds
DESCRIPTION Specifies the number of key rounds for the ESP
encryption algorithm.
SYNTAX unsigned 16-bit integer
VALUE Currently, key rounds are not defined for any ESP
encryption algorithms.
7.6.5. The Property UseReplayPrevention
The property UseReplayPrevention specifies whether replay prevention
detection is to be used. The property is defined as follows:
NAME UseReplayPrevention
DESCRIPTION Specifies whether to enable replay prevention
detection.
SYNTAX boolean
VALUE true - replay prevention detection is enabled.
false - replay prevention detection is disabled.
7.6.6. The Property ReplayPreventionWindowSize
The property ReplayPreventionWindowSize specifies, in bits, the
length of the sliding window used by the replay prevention detection
mechanism. The value of this property is meaningless if
UseReplayPrevention is false. It is assumed that the window size
will be power of 2. The property is defined as follows:
NAME ReplayPreventionWindowSize
DESCRIPTION Specifies the length of the window used by the replay
prevention detection mechanism.
SYNTAX unsigned 32-bit integer
7.7. The Class IPCOMPTransform
The class IPCOMPTransform specifies the IP compression (IPCOMP)
algorithm to propose during IPsec security association negotiation.
The class definition for IPCOMPTransform is as follows:
NAME IPCOMPTransform
DESCRIPTION Specifies the proposed IPCOMP algorithm.
ABSTRACT FALSE
PROPERTIES Algorithm
DictionarySize
PrivateAlgorithm
7.7.1. The Property Algorithm
The property Algorithm specifies the transform ID of the IPCOMP
compression algorithm. The property is defined as follows:
NAME Algorithm
DESCRIPTION Specifies the transform ID of the IPCOMP compression
algorithm.
SYNTAX unsigned 16-bit integer
VALUE 1 - OUI: a vendor specific algorithm is used and
specified in the property PrivateAlgorithm. Consult
[DOI] for other valid values.
7.7.2. The Property DictionarySize
The property DictionarySize specifies the log2 maximum size of the
dictionary for the compression algorithm. For compression algorithms
that have pre-defined dictionary sizes, this value is ignored. The
property is defined as follows:
NAME DictionarySize
DESCRIPTION Specifies the log2 maximum size of the dictionary.
SYNTAX unsigned 16-bit integer
7.7.3. The Property PrivateAlgorithm
The property PrivateAlgorithm specifies a private vendor-specific
compression algorithm. This value is only used when the property
Algorithm is 1 (OUI). The property is defined as follows:
NAME PrivateAlgorithm
DESCRIPTION Specifies a private vendor-specific compression
algorithm.
SYNTAX unsigned 32-bit integer
7.8. The Association Class SAProposalInSystem
The class SAProposalInSystem weakly associates SAProposals with a
System. The class definition for SAProposalInSystem is as follows:
NAME SAProposalInSystem
DESCRIPTION Weakly associates SAProposals with a System.
DERIVED FROM PolicyInSystem (see [PCIM])
ABSTRACT FALSE
PROPERTIES Antecedent[ref System [1..1]]
Dependent[ref SAProposal[0..n] [weak]]
7.8.1. The Reference Antecedent
The property Antecedent is inherited from the PolicyInSystem and is
overridden to refer to a System instance. The [1..1] cardinality
indicates that an SAProposal instance MUST be associated with one and
only one System instance.
7.8.2. The Reference Dependent
The property Dependent is inherited from PolicyInSystem and is
overridden to refer to an SAProposal instance. The [0..n]
cardinality indicates that a System instance may be associated with
zero or more SAProposal instances.
7.9. The Aggregation Class ContainedTransform
The class ContainedTransform associates an IPsecProposal with the set
of SATransforms that make up the proposal. If multiple transforms of
the same type are in a proposal, then they are to be logically ORed
and the order of preference is dictated by the SequenceNumber
property. Sets of transforms of different types are logically ANDed.
For example, if the ordered proposal list were
ESP = { (HMAC-MD5, 3DES), (HMAC-MD5, DES) }
AH = { MD5, SHA-1 }
then the one sending the proposal would want the other side to pick
one from the ESP transform (preferably (HMAC-MD5, 3DES)) list AND one
from the AH transform list (preferably MD5).
The class definition for ContainedTransform is as follows:
NAME ContainedTransform
DESCRIPTION Associates an IPsecProposal with the set of
SATransforms that make up the proposal.
DERIVED FROM PolicyComponent (see [PCIM])
ABSTRACT FALSE
PROPERTIES GroupComponent[ref IPsecProposal[0..n]]
PartComponent[ref SATransform[1..n]]
SequenceNumber
7.9.1. The Reference GroupComponent
The property GroupComponent is inherited from PolicyComponent and is
overridden to refer to an IPsecProposal instance. The [0..n]
cardinality indicates that an SATransform instance may be associated
with zero or more IPsecProposal instances.
7.9.2. The Reference PartComponent
The property PartComponent is inherited from PolicyComponent and is
overridden to refer to an SATransform instance. The [1..n]
cardinality indicates that an IPsecProposal instance MUST be
associated with at least one SATransform instance.
7.9.3. The Property SequenceNumber
The property SequenceNumber specifies the order of preference for the
SATransforms of the same type. The property is defined as follows:
NAME SequenceNumber
DESCRIPTION Specifies the preference order for the SATransforms
of the same type.
SYNTAX unsigned 16-bit integer
VALUE Lower-valued transforms are preferred over transforms
of the same type with higher values. For
ContainedTransforms that reference the same
IPsecProposal, SequenceNumber values must be unique.
7.10. The Association Class SATransformInSystem
The class SATransformInSystem weakly associates SATransforms with a
System. The class definition for SATransformInSystem System is as
follows:
NAME SATransformInSystem
DESCRIPTION Weakly associates SATransforms with a System.
DERIVED FROM PolicyInSystem (see [PCIM])
ABSTRACT FALSE
PROPERTIES Antecedent[ref System[1..1]]
Dependent[ref SATransform[0..n] [weak]]
7.10.1. The Reference Antecedent
The property Antecedent is inherited from PolicyInSystem and is
overridden to refer to a System instance. The [1..1] cardinality
indicates that an SATransform instance MUST be associated with one
and only one System instance.
7.10.2. The Reference Dependent
The property Dependent is inherited from PolicyInSystem and is
overridden to refer to an SATransform instance. The [0..n]
cardinality indicates that a System instance may be associated with
zero or more SATransform instances.
8. IKE Service and Identity Classes
+--------------+ +-------------------+
| System | | PeerIdentityEntry |
| ([CIMCORE]) | +-------------------+
+--------------+ |*w
1| (a) (b) |
+---+ +------------+
| |
|*w 1 o
+-------------+ +-------------------+ +---------------------+
| PeerGateway | | PeerIdentityTable | | AutostartIKESetting |
+-------------+ +-------------------+ +---------------------+
*| *| *| *|
+----------------------+ |(d) +----------+ |
(c) *| *| *| (e) |
*+------------+* |(f)
+-----------------| IKEService |-----+ |
| (g) +------------+ |(h) |
0..1| *| *| *o
+--------------------+ | +---------------------------+
| IPProtocolEndpoint | | | AutostartIKEConfiguration |
| ([CIMNETWORK]) | (i)| +---------------------------+
+--------------------+ |
0..1| |
|(j) +----------------+
*| |*
+-------------+* (k) +------------+ +-----------------------------+
| IKEIdentity |-------| Collection | | CredentialManagementService |
+-------------+ 0..1| ([CIMCORE])| | ([CIMUSER]) |
*| +------------+ +-----------------------------+
|(l)
*|
+--------------+
| Credential |
| ([CIMUSER]) |
+--------------+
(a) HostedPeerIdentityTable
(b) PeerIdentityMember
(c) IKEServicePeerGateway
(d) IKEServicePeerIdentityTable
(e) IKEAutostartSetting
(f) AutostartIKESettingContext
(g) IKEServiceForEndpoint
(h) IKEAutostartConfiguration
(i) IKEUsesCredentialManagementService
(j) EndpointHasLocalIKEIdentity
(k) CollectionHasLocalIKEIdentity
(l) IKEIdentitysCredential
This portion of the model contains additional information that is
useful in applying the policy. The IKEService class MAY be used to
represent the IKE negotiation function in a system. The IKEService
uses the various tables that contain information about IKE peers as
well as the configuration for specifying security associations that
are started automatically. The information in the PeerGateway,
PeerIdentityTable and related classes is necessary to completely
specify the policies.
An interface (represented by an IPProtocolEndpoint) has an IKEService
that provides the negotiation services for that interface. That
service MAY also have a list of security associations automatically
started at the time the IKE service is initialized.
The IKEService also has a set of identities that it may use in
negotiations with its peers. Those identities are associated with
the interfaces (or collections of interfaces).
8.1. The Class IKEService
The class IKEService represents the IKE negotiation function. An
instance of this service may provide that negotiation service for one
or more interfaces (represented by the IPProtocolEndpoint class) of a
System. There may be multiple instances of IKE services on a System
but only one per interface. The class definition for IKEService is
as follows:
NAME IKEService
DESCRIPTION IKEService is used to represent the IKE negotiation
function.
DERIVED FROM Service (see [CIMCORE])
ABSTRACT FALSE
8.2. The Class PeerIdentityTable
The class PeerIdentityTable aggregates the table entries that provide
mappings between identities and their addresses. The class
definition for PeerIdentityTable is as follows:
NAME PeerIdentityTable
DESCRIPTION PeerIdentityTable aggregates PeerIdentityEntry
instances to provide a table of identity-address
mappings.
DERIVED FROM Collection (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Name
8.2.1. The Property Name
The property Name uniquely identifies the table. The property is
defined as follows:
NAME Name
DESCRIPTION Name uniquely identifies the table.
SYNTAX string
8.3. The Class PeerIdentityEntry
The class PeerIdentityEntry specifies the mapping between peer
identity and their IP address. The class definition for
PeerIdentityEntry is as follows:
NAME PeerIdentityEntry
DESCRIPTION PeerIdentityEntry provides a mapping between a peer's
identity and address.
DERIVED FROM LogicalElement (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES PeerIdentity
PeerIdentityType
PeerAddress
PeerAddressType
The pre-shared key to be used with this peer (if applicable) is
contained in an instance of the class SharedSecret (see [CIMUSER]).
The pre-shared key is stored in the property Secret, the property
protocol contains "IKE", the property algorithm contains the
algorithm used to protect the secret (can be "PLAINTEXT" if the IPsec
entity has no secret storage), the value of property RemoteID must
match the PeerIdentity property of the PeerIdentityEntry instance
describing the IKE peer.
8.3.1. The Property PeerIdentity
The property PeerIdentity contains a string encoding of the Identity
payload for the IKE peer. The property is defined as follows:
NAME PeerIdentity
DESCRIPTION The PeerIdentity is the ID payload of a peer.
SYNTAX string
8.3.2. The Property PeerIdentityType
The property PeerIdentityType is an enumeration that specifies the
type of the PeerIdentity. The property is defined as follows:
NAME PeerIdentityType
DESCRIPTION PeerIdentityType is the type of the ID payload of a
peer.
SYNTAX unsigned 16-bit integer
VALUE The enumeration values are specified in [DOI] section
4.6.2.1.
8.3.3. The Property PeerAddress
The property PeerAddress specifies the string representation of the
IP address of the peer formatted according to the appropriate
convention as defined in the PeerAddressType property (e.g., dotted
decimal notation). The property is defined as follows:
NAME PeerAddress
DESCRIPTION PeerAddress is the address of the peer with the ID
payload.
SYNTAX string
VALUE String representation of an IPv4 or IPv6 address.
8.3.4. The Property PeerAddressType
The property PeerAddressType specifies the format of the PeerAddress
property value. The property is defined as follows:
NAME PeerAddressType
DESCRIPTION PeerAddressType is the type of address in
PeerAddress.
SYNTAX unsigned 16-bit integer
VALUE 0 - Unknown
1 - IPv4
2 - IPv6
8.4. The Class AutostartIKEConfiguration
The class AutostartIKEConfiguration groups AutostartIKESetting
instances into configuration sets. When applied, the settings cause
an IKE service to automatically start (negotiate or statically set as
appropriate) the Security Associations. The class definition for
AutostartIKEConfiguration is as follows:
NAME AutostartIKEConfiguration
DESCRIPTION A configuration set of AutostartIKESetting instances
to be automatically started by the IKE service.
DERIVED FROM SystemConfiguration (see [CIMCORE])
ABSTRACT FALSE
8.5. The Class AutostartIKESetting
The class AutostartIKESetting is used to automatically initiate IKE
negotiations with peers (or statically create an SA) as specified in
the AutostartIKESetting properties. Appropriate actions are
initiated according to the policy that matches the setting
parameters. The class definition for AutostartIKESetting is as
follows:
NAME AutostartIKESetting
DESCRIPTION AutostartIKESetting is used to automatically initiate
IKE negotiations with peers or statically create an
SA.
DERIVED FROM SystemSetting (see [CIMCORE])
ABSTRACT FALSE
PROPERTIES Phase1Only
AddressType
SourceAddress
SourcePort
DestinationAddress
DestinationPort
Protocol
8.5.1. The Property Phase1Only
The property Phase1Only is used to limit the IKE negotiation to a
phase 1 SA establishment only. When set to False, both phase 1 and
phase 2 SAs are negotiated. The property is defined as follows:
NAME Phase1Only
DESCRIPTION Used to indicate whether a phase 1 only or both phase
1 and phase 2 security associat