On a new server install on CentOS 5.1 I was getting very slow logins. Trying ssh with the -v (verbose) option showed that:
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
No credentials cache found
To skip this and continue with password authentication I amended /etc/ssh/sshd_config on the server and set:
# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
to:
# GSSAPI options
GSSAPIAuthentication no
#GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
So switching off GSSAPI Authentication.
