| 20 | FTP data | File Transfer Protocol (données) |
| 21 | FTP | File Transfer Protocol |
| 22 | SSH | SecureShell |
| 23 | TELNET | utilitaire Telnet |
| 25 | SMTP | Simple Mail Transfer Protocol |
| 42 | WINS | Windows Internet Naming Service |
| 49 | TACACS | Terminal Access Controller Access Control System |
| 53 | DNS | Domaine Name Service |
| 67 | BOOTP | Bootstrap Protocol |
| 69 | TFTP | Trivial File Transfer Protocol |
| 80 | HTTP | Hypertext Transfert Protocol |
| 88 | Kerberos | (du grec Cerbère, chien à trois têtes qui gardait les enfers) |
| 110 | POP3 | Post Office Protocol |
| 119 | NNTP | Network News Transfer Protocol |
| 143 | IMAP | Internet Message Access Protocol |
| 161 | SNMP | Simple Network Management Protocol |
| 179 | BGP | Border Gateway Protocol |
| 389 | LDAP | Lightweight Directory Acess Protocol |
| 443 | HTTPS | HTTP Secured |
| 445 | SMB | Server Message Block |
| 465 | SMTP over SSL | SMTP over Secure Socket Layer |
| 500 | ISAKMP | Internet Security Association and Key Management Protocol |
| 993 | IMAP over SSL | IMAP over Secure Socket Layer |
| 995 | POP over SSL | POP over Secure Socket Layer |
| 1701 | L2TP | Layer 2 Tunneling Protocol |
| 1723 | PPTP | Point to Point Tunneling Protocol |
| 1812 | RADIUS | Remote Authentication Dial-In User Service |