PortService
20FTP-DATA
21FTP
23Telnet, Internet BBS
25SMTP, Send mail
53DNS
79Finger
80HTTP, World Wide Web
110POP3, Receive mail
113AUTH, Authentication
119NNTP, Net News
139NETBIOS Session Service
161SNMP
162SNMP-TRAP
443HTTPS
500ISAKMP
517TALK
518NTALK
1723PPTP, Microsoft VPN
2049NFS, Sun Network File System