Firewall Ports needed open

[azrob]

I use a DSL modem for my server to access the internet. When I try port forwarding I have some issues with Plesk. But in DMZ all is fine. I was wondering if someon can help me with just what ports are needed for Plesk to function properly.

When I tried port forward I had ports:
20
21
25
53
80
110
8443
all open. Is there some I have missed? If I have missed any could someone tell me the port number and the service its for.

I am using 8.0.1

Thank You