[phloximaxi]

This is not true. Moving the port doesn't increase security by itself. BUT. If you use it with portsentry, it IS security!

- moving the port filters bots trying to connect - if an attacker tries to scan the open ports, will be immediately firewalled for that ip.

This protects not only the ssh service, but all the listening services on the host! Separates the clients by behaviour.

This can be bypassed only if the attacker spends a lot of time and IPs for the attack, which is a whole another level, because that is a very targeted attack and all of your security is under test.