I just worked a couple hours to update a bit an old guide.
After Step 5, I added a full new section: "# Firewall and Ports Configuration (Addendum 2016-12-03)"
Give it a look. It's not perfect but it add a lot of informations...

HowTo: Free SSL Certificate Creation and Configuration (UPDATED 2016-12-03)
https://forum.lisk.io/viewtopic.php?f=38&t=184