[TIPs]SSH Login Takes Long Time

Solution 1.
Add the following to /etc/ssh/sshd_config on your SSH server
UseDNS no
Then restart the ssh daemon and your pauses should be gone.

Solution 2.
Disabled this login method on the ubuntu client side (/etc/ssh/ssh_config).
Uncommented the single line (need to be root to do so...) in the ssh_config file:
GSSAPIAuthentication no
Once this is done, the password prompt immediately.

Reference:
a. http://ubuntuforums.org/showthread.php?t=630623