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Packet Filters 8-11
Standard Port Numbers
The table below contains information on standard port numbers
for some common services. For a complete list, see the most
recent “Assigned Numbers” RFC (currently RFC 1700).
TCP UDP Description
20 - File Transfer Protocol (data)
21 - File Transfer Protocol (control)
23 - Telnet
25 - Simple Mail Transfer Protocol
43 43 Who Is
53 53 Domain Name Service
- 69 Trivial File Transfer Protocol
70 70 Gopher
79 79 Finger
80 - World Wide Web HTTP
88 88 Kerberos
110 - Post Office Protocol - Version 3
111 111 Sun Remote Procedure Call
113 113 Authentication Service
119 - Network News Transfer Protocol
123 123 Network Time Protocol
161 161 SNMP (Total Control Manager)
162 162 SNMP trap
220 220 Interactive Mail Access Protocol v3
512 - remote process execution
513 - remote login (rlogin)
- 513 remote who (rwhod)
514 - remote command (rsh)
- 514 Syslog accounting
515 - lpd spooler
517 517 talk (terminal to terminal chat)