Maybe I'm just a security nut, but I would probably also relegate ssh to a non-default port, allow key-only authentication, narrow ciphers, close all other ports (except 80, 443, and 53). Also fail2ban, sysctl tweaks (networking, disable coredumps), and a whole bunch of other things I have in a script.
I've seen way too many people get their boxes trashed to leave an internet-accessible one exposed and unsecured.
