= Enabling Kerberos logins for your server = If you want kerberized logins on a server you run, you'll need a '''keytab''' from accounts. Fill out the [http://web.mit.edu/accounts/www/srvtabform.html keytab request form], which sends them an e-mail. Ask for a "keytab"; by default they'll give you a srvtab, the Kerberos 4 analogue. Your new keytab will be in {{{/mit/accounts/srvtabs/FOR_YOURUSERNAME}}}, which is AFS and vaguely insecure. You probably want to install it in {{{/etc/krb5.keytab}}}, and then randomize the key. {{{ # mv -f /etc/krb5.keytab /etc/krb5.keytab.old # back up any keytab you already have # mv /mit/accounts/srvtabs/FOR_JOEUSER/joeserver-new-keytab /etc/krb5.keytab # k5srvutil change }}} Then make sure your {{{/etc/ssh/sshd_config}}} file includes the lines {{{ GSSAPIAuthentication yes GSSAPIKeyExchange yes }}} This will let you SSH in with Kerberos. Then create a file called {{{.k5login}}} in the home directory of whichever users you want to be able log into with Kerberos. List the full KerberosPrincipal of each user, one per line (e.g., {{{joeuser@ATHENA.MIT.EDU}}}) == Dealing with srvtabs == If you don't specifically mention a "keytab" in your request to Accounts, they may give you the Kerberos 4 equivalent, a srvtab. In this case you'll want to convert the srvtab to a keytab, like so. {{{ $ ktutil ktutil: rst /mit/accounts/srvtabs/FOR_JOEUSER/joeserver-new-srvtab ktutil: wkt /etc/krb5.keytab ktutil: q }}}