There was code in some versions of NCSA httpd 1.5 and Mosaic 2.7beta to do
Kerberos authentication. Unfortunately this was non-standard and was not
carried forward into any modern software.

There are a number of ways to provide Kerberos password verification over an
SSL-protected pipe, but be aware that these schemes all are fraught with a
number of serious security problems. Nevertheless, you can find one example
of a module at:

   * <http://stonecold.unity.ncsu.edu/software/mod_auth_kerb/index.html>

The CyberSafe TrustBroker SSO/Web product provides a way to do Kerberos
authentication over the web. For more information, look at:

   * <http://www.cybersafe.com/solutions/trustbroker.html>

Probably the best protocol to use for this is the Kerberos Cipher Suites for
TLS, which is documented in IETF RFC 2712:

   * <http://www.ietf.org/rfc/rfc2712.txt>

An open-source implementation of this, called KSSL, can be found at
SourceForge:

   * <http://sourceforge.net/projects/kssl/>