R1#sho ip nbar port-map h323
port-map h323 udp 1300 1718 1719 1720 11720
port-map h323 tcp 1300 1718 1719 1720 11000 - 11999
Finding out port numbers with NBAR show commands
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:
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