Linux

Hi, We currently have a problem on a centos server when i try to ssh to it there is a significant delay in getting a login prompt. What would be the steps in troubleshooting this issue? I have try to narrow down a possible network issue but cannot see anything obviously wrong in the routing table, I also believe the dns is ok, i am ssh'ing to an ip address not a hostname so shouldnt have to resolve it.

If you search this is a common question on the board, its a dns issue.

in /etc/ssh/sshd_conf set

UseDNS no

in that config file use dns yes is commented out

#UseDNS yes


does it therefore assume no?

Im pretty sure the default is yes. Thats why I would say set it to no to fix the problem.

what terminal program are you using? Could it be the client/exchange and not DNS?

Also, after any changes, you should restart the service/daemon

redhat based would be something like
service sshd restart

suse would be
rcsshd restart or some such. (you can tab to complete)