Firewall ports to be opened

Unanswered Question
Jun 5th, 2007


I have a Call Manager cluster which is having a trunk to another Cluster.

I am going to put a firewall between these two clusters. Can anyone tell me what all ports need to be opened on the firewall to maintain this trunk.

If the firewall is in between one IP phone and CCM what ports need to enabled to have Phone-CCM communication.



I have this problem too.
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thisisshanky Tue, 06/05/2007 - 09:32

I would recommend putting a sniffer and gather port information off of there, before the firewall is in place.

Typically an ICT should use H323 TCP ports from 1024 through 4999 for control signalling. Most times RTP media stream will need to be terminated through an MTP (either software or hardware), so you would also have to open up RTP traffic (UDP port 16384 through 32767)

To answer your other question about Phone to CCM communication, I would recommend looking at CCO and search for "callmanager tcp udp port". Depending on the version of CM you have you will find various documents specifying the ports.



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