[asterisk-bugs] [JIRA] (ASTERISK-26654) iLBC Major NAT Issues

[Luke Escude (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=234200#comment-234200 ] 

Luke Escude commented on ASTERISK-26654:
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FIGURED IT OUT!

This is iLBC related. The iLBC codec is IGNORING rport,comedia settings. Even though none of these calls are even using iLBC, the simple fact that iLBC is being offered makes the call lose audio.

A ticket with similar issues: ASTERISK-26593


> iLBC Major NAT Issues
> ---------------------
>
>                 Key: ASTERISK-26654
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26654
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>         Environment: CentOS x64 - No NAT, public IP
>            Reporter: Luke Escude
>         Attachments: 2calls.pcap, asterisk_debug, extensions.conf, GOOD_AstDebug, GOODCALL.pcap, sip.conf
>
>
> We have been struggling with random (very inconsistent) one-way audio phone calls for a couple of months now. Out of the 10,000 phone calls we process per day, this only happens to less than 20 of them.
> This issue ONLY affects a few of my customers on a raw Asterisk installation, none of my FreePBX customers are having any issues.
> The server is hosted in our datacenter with a public IP - no firewall, no NAT, and it trunks to Flowroute. The customer is behind NAT, however the system works just fine like this - we always have 2-way audio between customer and our server.
> Attached is a PCAP of 2 phone calls that experienced one-way audio, and the console debug messages from asterisk.
> Flowroute is pulling a packet capture of their side for me, as we speak.
> New info: Calling her works flawlessly on FreePBX.



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