I've had my firewall off for the longest time because it would cause issues. I'm needing to turn it back on or figure something out because others are using my server as a relay smtp server and I'm maxing out my 1000 messages allowed by Road Runner. Whenever I enable my firewall, I'm hacing issues with mySQL. I have 2 sites: www.plastikracing.net and www.plastikhosting.net. To login to PlastikHosting, it connects to the SQL database on PlastikRacing to check login information. When I enable the firewall, something doesn't work at all because I won't connect to the database for some reason. Also, I need to figure out what to do to keep people from using my server as a SMTP relay.