Question : How to fix delay in SSH Login ?
DNS lookup query is an SSH feature that you can find in most Linux distros, this feature is responsible for the delay because SSH wait for a response of reverse DNS lookup query that is been made to DNS Server.
To overcome this issue, please follow these steps:
1- Edit /etc/ssh/sshd_config on sshd Server
and add this DNS option to the file:
save and exit
2- Now add the following line to your /etc/resolv.conf.