| Port | Service |
|---|---|
| 5 | RJE - Remote Job Entry |
| 7 | ECHO |
| 8 | (ICMP) handles Ping requests |
| 11 | USERS - Active Users |
| 13 | DAYTIME |
| 20 | FTP-DATA (Data) |
| 21 | FTP (Control) |
| 23 | Telnet, Internet BBS |
| 25 | SMTP, Send mail |
| 37 | TIME |
| 42 | NAMESERV - Host Name Server |
| 43 | NICNAME - Who is |
| 53 | DOMAIN - DNS |
| 69 | TFTP - Trivial File Transfer Protocol |
| 70 | Gopher - Used to browse Internet resources |
| 79 | Finger |
| 80 | HTTP, World Wide Web |
| 110 | POP3, Receive mail |
| 113 | AUTH, Authentication |
| 119 | NNTP, Net News |
| 137 | NETBIOS-NS - NetBIOS Name Service |
| 138 | NETBIOS-DG - NetBIOS Datagram |
| 139 | NETBIOS Session Service |
| 161 | SNMP - Simple Network Management Protocol |
| 162 | SNMP-TRAP |
| 443 | HTTPS |
| 445 | SMB over TCP |
| 500 | ISAKMP |
| 515 | LPD - Remote Printing |
| 517 | TALK |
| 518 | NTALK |
| 1433 (or 1434) | Microsoft SQLServer |
| 1723 | PPTP, Microsoft VPN |
| 2049 | NFS, Sun Network File System |
| 3389 | Microsoft Terminal Services |
| 5631, 5632 | PcAnywhere |
| 8080 | Commonly used for HTTP and orixy servers |