[SERVER] Howto Fix SSH slow to ask for password in Ubuntu + SSH Server installation howto

When I freshly installed UBUNTU , and tried to login to Ubuntu via ssh , it always took up-to 5-10 seconds to ask for password. The quick fix was

Solution # 1

The quick fix was to inform ssh to stop using DNS during the connection.

Issue the following command in terminal and restart SSH.

sudo echo “UseDNS no” >> /etc/ssh/sshd_config

OR

You can do it manually on the config file.

Add the following to your sshd_config file and restart SSH.

Edit the /etc/ssh/sshd_config file using the following command

nano  /etc/ssh/sshd_config

& Add the following line at top.

UseDNS no

Save the File and Exit and Re-Try Login. It ill work fast now without delays.

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Solution # 2

Edit the /etc/ssh/ssh_config file using the following command

nano  /etc/ssh/ssh_config

Commen the following lines by adddin # at start of the line

GSSAPIAuthentication yes

GSSAPIDelegateCredentials no

TO

# GSSAPIAuthentication yes

# GSSAPIDelegateCredentials no

save the file and exit and restart SSH service by

service ssh restart

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Howto install SSH Server in Ubuntu

apt-get install openssh-server