Monitoring MGCP traffic.

 

Via the VoIP calls window, I can locate calls that I am after. However, Wireshark doesn’t allow me to make use of the “filter” option.

It seems that it is only possible to build filters as large as 80 messages. Unfortunately, the call I was after included 172 messages.

Maybe just a filter string length issue?!

 

As it was an MGCP call, I was able to systematically go through the call and filter on the transaction ids, as each primary action i.e. MDCX/CRCD/DLCX will have all responses tagged with their transaction id.

 

Is there an easier way of doing this, as it took a while to record around 40 transaction ids then, build a filter to include them.

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