Appendix; Common Port Assignments - Cisco CISCO851-K9 - 851 Integrated Services Router Configuration Manual

Common Port Assignments

Table D-1
possible, the User Datagram Protocol (UDP) uses the same numbers.
Table D-1
Port
0
1–4
5
7
9
11
13
15
17
19
20
21
23
25
37
39
42
43
49
53
67
68
69
75
OL-5332-01
lists currently assigned Transmission Control Protocol (TCP) port numbers. To the extent
Currently Assigned TCP and UDP Port Numbers
Keyword
—
—
RJE
ECHO
DISCARD
USERS
DAYTIME
NETSTAT
QUOTE
CHARGEN
FTP-DATA
FTP
TELNET
SMTP
TIME
RLP
NAMESERVER
NICNAME
LOGIN
DOMAIN
BOOTPS
BOOTPC
TFTP
—
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
A P P E N D I X
Description
Reserved
Unassigned
Remote job entry
Echo
Discard
Active users
Daytime
Who is up or NETSTAT
Quote of the day
Character generator
File Transfer Protocol (data)
File Transfer Protocol
Terminal connection
Simple Mail Transport Protocol
Time
Resource Location Protocol
Hostname server
Who is
Login Host Protocol
Domain name server
Bootstrap Protocol Server
Bootstrap Protocol Client
Trivial File Transfer Protocol
Any private dial-out service
D
D-1