List of Common Ports
This is meant to be a list of TCP/UDP port mappings as I run into ports. There will always be much more complete lists, but the goal here is to have a focused list. Ports are TCP unless otherwise noted.
| Port | Usage |
|---|---|
| 20 | FTP data |
| 21 | FTP |
| 22 | ssh |
| 23 | telnet |
| 25 | SMTP |
| both/53 | DNS (usually UDP) |
| udp/67 | DHCP/BOOTP server |
| udp/68 | DHCP/BOOTP client |
| 80 | HTTP |
| 110 | POP3 |
| 119 | NNTP (Usenet) |
| udp/123 | NTP |
| both/137 | NetBIOS name services |
| both/139 | NetBIOS session services |
| both/143 | IMAP |
| both/161 | SNMP |
| both/162 | SNMP traps |
| 443 | HTTPS |
| both/445 | Windows/SMB shares; Active Directory on TCP |
| udp/514 | syslog protocol (default) |
| 1026 | MS Calendar Access Protocol; MS Messenger spam |
| tcp/1434, udp/1434 | MS SQL, MS SQL Monitor, Slammer |
| 3128 | Web cache/proxies, e.g. squid |
| 3306 | MySQL |
| 5190 | AIM and ICQ |