Cisco 520-T1 Software Guide - Page 153

D, Common Port Assignments, Table D-1, TCP Port Numbers

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D A P P E N D I X Common Port Assignments OL-14210-01 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 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 TCP 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 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 Cisco Secure Router 520 Series Software Configuration Guide D-1

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D-1
Cisco Secure Router 520 Series Software Configuration Guide
OL-14210-01
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
TCP 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