Wireshark-bugs: [Wireshark-bugs] [Bug 7763] Megaco protocol incorrect dissecting criteria
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Thu, 27 Sep 2012 11:49:26 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7763

--- Comment #6 from Pascal Quantin <pascal.quantin@xxxxxxxxx> 2012-09-27 11:49:25 PDT ---
(In reply to comment #2)
> Hi,
> 
> I understand and I have no objection to that. I would like to note, however,
> that the phone chosen this port to communicate with the PBX. There would be no
> conflict, if Megaco would had heuristic dissector.

Note that heuristics dissectors can also trigger false positive as depending on
the protocol characteristics, you might come up with a weak algorithm.
If you do not want to deactivate MEGACO protocol, you can also go into Edit ->
Preferences -> Protocols -> TCP and check "Try heuristics sub-dissectors
first".
This way the heuristics dissectors (including Q.931) will be tried before the
protocol registered for the port number.

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