what ports need to be open for gateway firewall
I have a Smoothwall firewall in front of my IPSConfig server. I would like to tighten the rules for it, (right now everything for ISPConfig is on the DMZ).
So far, I have been able to find the following info on firewall ports;
DNS 53, (tcp & udp)
POP3 Server 110
Does anyone know if I need anything else open?