Checking common port numbers on Cisco IOS

Angel Castaneda — Sat, 10 Jan 2009 20:25:23 +0000

While memorizing a bunch of port numbers definitely helps you impress the ladies, not everyone has that ability. Fortunately, you can check common port numbers right on the Cisco IOS command line.

Router> enable
Router# conf t
Router# access-list 100 permit tcp any any eq ?

This will result in the following table:

 <0-65535>Â Â Â  Port number
bgpÂ Â Â Â Â Â Â Â Â  Border Gateway Protocol (179)
chargenÂ Â Â Â Â  Character generator (19)
cmdÂ Â Â Â Â Â Â Â Â  Remote commands (rcmd, 514)
daytimeÂ Â Â Â Â  Daytime (13)
discardÂ Â Â Â Â  Discard (9)
domainÂ Â Â Â Â Â  Domain Name Service (53)
echoÂ Â Â Â Â Â Â Â  Echo (7)
execÂ Â Â Â Â Â Â Â  Exec (rsh, 512)
fingerÂ Â Â Â Â Â  Finger (79)
ftpÂ Â Â Â Â Â Â Â Â  File Transfer Protocol (21)
ftp-dataÂ Â Â Â  FTP data connections (used infrequently, 20)
gopherÂ Â Â Â Â Â  Gopher (70)
hostnameÂ Â Â Â  NIC hostname server (101)
identÂ Â Â Â Â Â Â  Ident Protocol (113)
ircÂ Â Â Â Â Â Â Â Â  Internet Relay Chat (194)
kloginÂ Â Â Â Â Â  Kerberos login (543)
kshellÂ Â Â Â Â Â  Kerberos shell (544)
loginÂ Â Â Â Â Â Â  Login (rlogin, 513)
lpdÂ Â Â Â Â Â Â Â Â  Printer service (515)
nntpÂ Â Â Â Â Â Â Â  Network News Transport Protocol (119)
pim-auto-rpÂ  PIM Auto-RP (496)
pop2Â Â Â Â Â Â Â Â  Post Office Protocol v2 (109)
pop3Â Â Â Â Â Â Â Â  Post Office Protocol v3 (110)
smtpÂ Â Â Â Â Â Â Â  Simple Mail Transport Protocol (25)
sunrpcÂ Â Â Â Â Â  Sun Remote Procedure Call (111)
syslogÂ Â Â Â Â Â  Syslog (514)
tacacsÂ Â Â Â Â Â  TAC Access Control System (49)
talkÂ Â Â Â Â Â Â Â  Talk (517)
telnetÂ Â Â Â Â Â  Telnet (23)
timeÂ Â Â Â Â Â Â Â  Time (37)
uucpÂ Â Â Â Â Â Â Â  Unix-to-Unix Copy Program (540)
whoisÂ Â Â Â Â Â Â  Nicname (43)
wwwÂ Â Â Â Â Â Â Â Â  World Wide Web (HTTP, 80)

Content Copyright Sean Walberg

Checking common port numbers on Cisco IOS

No related posts.

Related posts brought to you by Yet Another Related Posts Plugin.

CCNP Recertification » Angel Castaneda

Checking common port numbers on Cisco IOS