On 07 Sep 2015, at 00:41, Kanwar Ranbir Sandhu <m3freak@thesandhufamily.ca> wrote:
Hello,
I'm trying to get Dovecot to use GSSAPI for authentication. I have an IPA server on CentOS 7 with a bunch of my servers attached to the IPA domain, including the server running Dovecot.
I've followed official documentation from Red Hat and read numerous wiki articles on how to configure Dovecot to get it to use GSSAPI correctly. I don't think I've done anything incorrectly, but it refuses to work. This is the error I'm seeing:
mailman02 dovecot: imap-login: Disconnected (tried to use unsupported auth mechanism): user=<>, method=PLAIN, rip=1.1.1.1, lip=2.2.2.2, TLS, session=<QhWSqxofyAAKyAkM>
It says "tried to use unsupported auth mechanism". In your later mail you say that telnet shows AUTH=GSSAPI in capabilities. So that would mean that the client isn't using AUTHENTICATE GSSAPI but something else.
Set auth_debug=yes and/or see what the client actually does by enabling pre-login rawlog: http://wiki2.dovecot.org/Debugging/Rawlog