Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 187

Keyword, Description, Table D-1, Currently Assigned TCP and UDP Port Numbers

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D A P P E N D I X Common Port Assignments OL-5332-01 Table D-1 lists currently assigned Transmission Control Protocol (TCP) port numbers. To the extent possible, the User Datagram Protocol (UDP) uses the same numbers. Table D-1 Currently Assigned TCP and UDP Port Numbers Port Keyword 0 - 1-4 - 5 RJE 7 ECHO 9 DISCARD 11 USERS 13 DAYTIME 15 NETSTAT 17 QUOTE 19 CHARGEN 20 FTP-DATA 21 FTP 23 TELNET 25 SMTP 37 TIME 39 RLP 42 NAMESERVER 43 NICNAME 49 LOGIN 53 DOMAIN 67 BOOTPS 68 BOOTPC 69 TFTP 75 - 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 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide D-1

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