PortServiceProtocolDirectionNotes
20 ftp tcpinbound/outbound
21 ftp tcp, udpinbound/outbound
22 ssh tcp inbound
25 smtp tcpinbound/outbound
26 smtp tcpinbound/outbound
37 rdate tcp outbound
43 whos tcp outbound
53 DNS tcp, udpinbound/outboundInbound only needed if you run
your own DNS server
80 http tcpinbound/outbound
110 pop3 tcp inbound
113 ident tcp outbound
143 imap4 tcp inbound
443 https tcp inbound
 465smtp tcp, ssl, udpinbound/outbound
 873 rsync tcp, udp outbound
 993 imap4 ssl, tcp inbound
 995 pop3 ssl, tcp inbound
 2082 cpanel tcp inbound
 2083 cpanel ssl, tcp inbound
 2086 whm tcp inbound
 2087whm ssl tcp, ssl inbound
 2089cp license tcp outbound
 2095 webmail tcp inbound
 2096 webmail  ssl, tcp inbound
 3306 mysql tcp inboundOnly if you need to connect
remotely
6666chat tcp inbound