That answer does not inspire confidence. 1) Random port is not helping against a specific attacker. Get a real firewall 2) Fail2ban is not a real firewall 3) K

That answer does not inspire confidence. 1) Random port is not helping against a specific attacker. Get a real firewall 2) Fail2ban is not a real firewall 3) Keys only, no passwords. 40chars is nothing compared to a strong rsa key with a 40char password on it