Also reproduces in the released version of 12.04 (64-bit desktop edition), as follows:
30-second delay before the password prompt is displayed when ssh'ing directly to the IP address (no DNS lookup involved) of a machine on the same network segment. Adding "GSSAPIAuthentication no" to ~/.ssh/config removes the delay.
I encountered this same problem (with the same cure) a couple of years ago in a different corporate network environment.
Also reproduces in the released version of 12.04 (64-bit desktop edition), as follows:
30-second delay before the password prompt is displayed when ssh'ing directly to the IP address (no DNS lookup involved) of a machine on the same network segment. Adding "GSSAPIAuthenti cation no" to ~/.ssh/config removes the delay.
I encountered this same problem (with the same cure) a couple of years ago in a different corporate network environment.