[CentOS] Services supporting Kerberos and/or TLS client certificate authentication

Hello,

We're starting to use FreeIPA in house (which is awesome btw) which means
that Kerberos and TLS client certificate authentication is suddenly quite
easy. Im looking for a list of common Linux services with data on how one
can Authenticate/Authorise for these services.

* httpd support TLS client certificate authentication and Kerberos
* rabbitmq supports TLS client certificate authentication
* dovecot supports Kerberos and ...

etc, etc

Cheers,

Andrew