Posted on Saturday, 10th January 2009 by Angel Castaneda
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
bgp         Border Gateway Protocol (179)
chargen     Character generator (19)
cmd         Remote commands (rcmd, 514)
daytime     Daytime (13)
discard     Discard (9)
domain      Domain Name Service (53)
echo        Echo (7)
exec        Exec (rsh, 512)
finger      Finger (79)
ftp         File Transfer Protocol (21)
ftp-data    FTP data connections (used infrequently, 20)
gopher      Gopher (70)
hostname    NIC hostname server (101)
ident       Ident Protocol (113)
irc         Internet Relay Chat (194)
klogin      Kerberos login (543)
kshell      Kerberos shell (544)
login       Login (rlogin, 513)
lpd         Printer service (515)
nntp        Network News Transport Protocol (119)
pim-auto-rp 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)
smtp        Simple Mail Transport Protocol (25)
sunrpc      Sun Remote Procedure Call (111)
syslog      Syslog (514)
tacacs      TAC Access Control System (49)
talk        Talk (517)
telnet      Telnet (23)
time        Time (37)
uucp        Unix-to-Unix Copy Program (540)
whois       Nicname (43)
www         World Wide Web (HTTP, 80) No related posts.
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Posted in General | Comments (2)
January 10th, 2009 at 2:34 pm
[...] Note: Sean suggested I blog about my CCNA studies on his website. This post was originally posted there, and I might be doing some cross posting for the next little [...]
January 14th, 2009 at 3:21 am
It’s even easier: “show ip port-map”.