In this How-To article we’re going to walk you through changing the default SSH server listening port on a Linux system.
The Secure Shell (SSH) Protocol by default uses port 22. Accepting this value does not make your system insecure, nor will changing the port provide a significant variance in security. However, changing the default SSH server listening port will stop many automated attacks and a bit harder to guess which port SSH is accessible from. The attacker should execute a nmap like scan against your host to discover the port SSH service listens. So changing the default SSH port has no meaning on private networks, but maybe it’s useful and it’s a simple security hardening technique on public accessible hosts. Continue reading “How to change the default SSH port”