Hello, This is more of a troubleshooting scenario and may have to check different parameters as we narrow down the issue. Some points I think are: > Is the app asterisk-iax allowed, based on the type of application may be some traffic is not being passed. > Some times voip related apps may have variations on behavior with change in App content version as decoders would be getting updated, so if it was working at certain content version and not in another that may be the reason. > If the voip servers are internal, did you check by disabling nat rules to see if natting has issue. Also it is good test mechanism to test with 1:1 nat but looks like this was tested already. > Did you try and see the global counters at the time of passing traffic, this would give us an idea on the drops done by pan. We will have to set up filters for specific source and destination and run the global counters command while traffic passing. "show counter global filter packet-filter yes delta yes " Run this back to back multiple times which would give some idea. But I would suggest if a case is not opened yet pls open to isolate the issue. Thanks
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