CCIE Pursuit Blog

January 19, 2009

Lab Tip: Finding Port Numbers For Common Protocols

I stumbled across a couple of very cool resources for finding the ports of common protocols during the CCIE lab.  The first comes from GroupStudy and is a link to the Addresses, Protocols, and Ports section of the ASA 5580 configuration guide:

You’ll probably want to practice finding this page in the DOCCD.

You can get there via:

Security
Firewall Appliances
Cisco ASA 5500 Series Adaptive Security Appliances
Configuration Guides
Cisco ASA 5580 Adaptive Security Appliance Command Line Configuration Guide, Version 8.1
Reference
Addresses, Protocols, and Ports

This page has a very good list of the TCP and UDP port numbers for a multitude of different protocols.

If you want a quick and dirty port list, then this tip from CCIE2Be (I found it via GlobalConfig.net) is a great choice.

I had a filtering task that said to allow H323 Traffic to a specific vlan. Well…what ports does H323 use? I could not find it on the DocCD but I remembered a show command that will let us know:

r1#sh ip nbar port-map h323

 

port-map h323                     udp 1300 1718 1719 1720 11720
port-map h323                     tcp 1300 1718 1719 1720 11000 – 11999

Some other examples:

r6# sh ip nbar port-map sip
port-map sip                      udp 5060
port-map sip                      tcp 5060

r6#sh ip nbar port-map skinny
port-map skinny                   tcp 2000 2001 2002

r6# sh ip nbar port-map snmp
port-map snmp                     udp 161 162
port-map snmp                     tcp 161 162

r6# sh ip nbar port-map bgp
port-map bgp                      udp 179
port-map bgp                      tcp 179

r6#sh ip nbar port-map rip
port-map rip                      udp 520

show ip nbar port-map

 

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1 Comment »

  1. This is great. Thanks for the tip.

    Also, thanks for the Core Knowledge Question of the Day series. You’re are helping me realize how much I don’t know!

    Comment by Chris — May 25, 2009 @ 9:33 am | Reply


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