[Network Administration] : Kerberized IMAP

To go with the Kerberized Postfix that I’ve put in place, I also added Kerberized IMAP to it as well. This will allow me to authenticate the IMAP server with my Kerberos tickets. This works similarly. I’m using Carnegie Mellon’s Cyrus IMAP server (although CMU has migrated all of it’s accounts over to Google since). The Cyrus server supports GSSAPI natively, and other mechanisms through their SASL implementation. Using GSSAPI, I can now connect from my mail client and access my IMAP mailbox using my already granted ticket.
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[Network Administration] : Kerberized Postfix

I updated my mail server and connected this into the kerberized system that was put in place earlier. Previously I had my mail accounts defined in a MYSQL database, which worked alright, but was really more of a hassle since any password changes needed to be done both in the system, and in the mysql database which was used by postfix. Either I had a single password, and needed to update both databases if it was changed, or I had to let them diverge. I’ll need an authentication mechanism so that I can submit mail from the mail client (MUA) for delivery. This time, I connected postfix, which I use as my MTA, to the Kerberos server to do the authentication. Postfix supports SASL mechanisms for authentication and can use it for both GSSAPI and PLAIN authentication against the Kerberos system. The postfix website has a whole page describing use of SASL with Postfix. I used Cyrus SASL from Carnegie Mellon University to do the authentication.
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[Network Administration]: Kerberized SSH

At this point, most of the infrastructure is in place. Now I could tie some other services together with this infrastructure. For my servers (not the kerberos KDC and LDAP directory), I’ve configured kerberized SSH. It’s a good starting point to see the benefits of single sign-on. Continue reading “[Network Administration]: Kerberized SSH”