SSH login slowness troubleshooting
In newly installed servers,
while trying to login using "ssh" we may feel some slowness to get the
password prompt . Most of us think that this is due to network level DNS
issue, but actually the assumption is wrong there is a parameters in
the SSH configuration file which makes delay in getting this password
prompt.
Let us see the solution for the above issue in Sun SSH and Open SSH.
In SunSSH,
Add the mentioned parameter in the file /etc/ssh/sshd_config
LookupClientHostnames no
In OpenSSH,
Edit the mentioned parameter in the file /etc/ssh/sshd_config
UseDNS noAfter that restart the ssh service and check the response of quick password prompt while login to the servers through ssh
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