If you would like to help protect your site against brute-force attacks, start by changing your SSH Port. Here’s how:
1. Edit the ssh config file:
# sudo nano /etc/ssh/sshd_config
Find this line:
Port 22
Now simply change your port number from ’22’ to something else. Just make sure it’s not a port that is used for something else.
Port 1234
2. Restart SSH
# sudo /etc/init.d/ssh restart
3. Close your SSH session and re-establish, like this:
# ssh root@host -p 1234
Done.