An unsupported patch for nnrpd to add ident support can be found via
FTP at ftp://ftp.csie.nctu.edu.tw/pub/News/packages/nnrpd-ident.tar.gz  It
includes patches to add tin's xuser and xmotd commands as well as a
list subscription system. (skhuang@csie.nctu.edu.tw)

Remember: ident information is only as valid as the server you connect
to.  Any fool with root access (or anyone with a PC or Mac) can create
a bogus ident server that will give out whatever information they want
you to see.  It's not an authorization or identification protocol, it's
just informational.

The authd protocol is added to nnrpd by <nhiro@isci.kyutech.ac.jp>.
This unsupported patch can be found in
ftp://ftp.eos.hokudai.ac.jp/pub/network/news/inn/patches/authd-patch-1.3.tar.gz
The documentation is in Japanese.  Good luck.

In a future release, you will be able to log all POST commands with
ident information if you so choose.  (Maybe INN 1.5)

Some parts © 2009 Advameg, Inc.