| Port(s) | Service |
| 20, 21 | File Transfer Protocol (FTP) |
| 23 | Telnet |
| 25 | Simple Mail Transfer Protocol (SMTP) |
| 50, 51 | IPSec |
| 53 | Domain Name Server (DNS) |
| 67, 68 | Dynamic Host Configuration Protocol (DHCP) |
| 69 | Trivial File Transfer Protocol (TFTP) |
| 80 | HyperText Transfer Protocol (HTTP) |
| 88, 749 | Kerberos |
| 110 | Post Office Protocol (POP3) |
| 119 | Network News Transport Protocol (NNTP) |
| 137-139 | NetBIOS |
| 143 | Internet Message Access Protocol (IMAP4) |
| 161, 162 | Simple Network Management Protocol (SNMP) |
| 389 | Lightweight Directory Access Protocol (LDAP) |
| 443 | HTTP with Secure Sockets Layer (SSL) |
| 500 (UDP), 1701 | Layer Two Tunneling Protocol (L2TP) |
| 1723 | Point-to-point Tunneling Protocol (PPTP) |
