Yould you please tell me, where the output was freezing (where you 20 seconds got lost?)
It might be the gssapi-w authentification.
login as
[email protected]\
and edit /etc/ssh/sshd_config
Check whether you find the the line
GSSAPIAuthentication yes
and set it to now.
if it was already set to no,
then try adding the line
UseDNS no
afterwards restart the ssh server
/etc/init.d/ssh restart