rtelnet 107/udp
pop-2 109/tcp postoffice # POP version 2
pop-2 109/udp
-pop-3 110/tcp # POP version 3
-pop-3 110/udp
+pop-3 110/tcp pop3 # POP version 3
+pop-3 110/udp pop3
sunrpc 111/tcp portmapper # RPC 4.0 portmapper TCP
sunrpc 111/udp portmapper # RPC 4.0 portmapper UDP
auth 113/tcp authentication tap ident