Host not found in DNS.
-=item 2
+=item 2Z<>
Timeout while attempting to connect to the remote host.
-=item 3
+=item 3Z<>
Connection to the remote host failed for some reason.
-=item 4
+=item 4Z<>
A Kerberos failure, generally either the lack of a local ticket cache or
the lack of a service principal for the remote host.
-=item 5
+=item 5Z<>
Some error occurred during the actual protocol exchange.
-=item 6
+=item 6Z<>
An internal system error occurred on the client host, unrelated to the
remote host.