Set SSH protocol to 2

Set SSH protocol to 2

SSH has two protocols it may use, protocol 1 and protocol 2. The older protocol 1 is less secure and should be disabled unless you know that you specifically require it.

1. Open the sshd config
   vi /etc/ssh/sshd_config
   
   
2. Add or amend as shown below
   # Protocol 2,1
Protocol 2
   
   
3. Restart the sshd service
   systemctl restart sshd.service