Re: [CentOS] long delay when logging in

On 16/11/16 11:06 PM, Peter wrote:

On 17/11/16 16:34, Digimer wrote:

...

Edit /etc/ssh/sshd_config

Set:

UseDNS no GSSAPIAuthentication no

Save, restart sshd, try again.

This will certainly stop the long timeout, but I prefer telling people to fix their DNS. The long timeout is indicative of a DNS issue and turning off DNS for ssh is just masking the real problem. I prefer to leave DNS on for ssh as it's a good indicator for me of when I have to fix something.

Peter

It can also happen if the target has lost its internet connection, is air-gapped or otherwise legitimately offline. Your point is valid, though, if the Internet should be up.