RTP not transmitting over NAT

22 Feb 2020

      Dear Sergey Safarov,
As I said earlier there are several scenario that I'm working on hoping one of them to work. When I use internal profile and I set bypass-media to "true", all clients residing on the same network can have voice and video call with or without ZRTP and adding or removing video to/from call works excellent.But, when using internal profile if I try to call one of clients on another network such as mobile data, the call takes place but no audio is gransmitted(no ZRTP).And if I use external profile and set bypass-media and inbound-zrtp-passthru to "true", all clients regardless of NAT, Wi-fi or mobile data can call each other with ZRTP but no video! when I press the video button on Linphone nothing happens! and of course I've added H26x to codecs.I've also reviewed Jira topics and commits you mentioned but they are not related to my problem.
Thanks again for helping.

Is without ZRTP video/addition removing works well?
Case 1Without ZRTP similar case fixed about two years ago. Sorry I cannot find related ticked created by me (jira login safarov).
Please retest master and try bisect with commits 1-3 years ago.
Think you will find working version and where bug is introduced.

Case 2
Please look https://freeswitch.org/jira/browse/FS-9203
https://freeswitch.org/jira/browse/FS-9206

Here you will find commit where it worked properly.
Just need bisect with master and find commit introduced bug.
Case 3Useless for you. This not designed for users behind NAT.
So simple do not use.
Sergey
On Fri, Feb 21, 2020 at 7:22 AM Faisal Hanif <imfanee@gmail.com> wrote:

In you are using linphone mobile clients make sure you have added "stun.linphone.org" in account specific stun settings,If you need both ZRTP & NAT handling keep media in proxy mode.
On Fri, Feb 21, 2020, 6:29 AM I K via FreeSWITCH-users <freeswitch-users@lists.freeswitch.org> wrote:

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To: "freeswitch-users@lists.freeswitch.org" <freeswitch-users@lists.freeswitch.org>
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Date: Sat, 15 Feb 2020 22:11:12 +0000 (UTC)
Subject: RTP not transmitting over NAT
Hi every one,
I'm new to Freeswitch and I'm having some difficulty configuring it, despite reading the documents. I have a Freeswitch running on a server with public IP and several Linphone android clients running behind NAT.How should I configure it to transfer audio and video and use ZRTP if one client is on a LAN behind NAT and the other client is using mobile data?!
Things I've acheived so far:1- bypass-media = false and proxy-media = false:In this mode audio works but when I turn on video no request is sent to the other phone. It other use just has to know when to turn on the camera to receive video. and of course ZRTP does not work well.
2-  bypass-media = false and proxy-media = true:audio works but video shows blank3- bypass-media = true and proxy-media = false:If both clients are on the same LAN everything works fine, but if one client connects via mobile data, they can still call each other but no media is transferred and the call is dropped after 30s.
I've been working on this scenario for over a week and I'm desperate to make it work. Thanks in advance for your help.

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From: I K via FreeSWITCH-users <freeswitch-users@lists.freeswitch.org>
To: "freeswitch-users@lists.freeswitch.org" <freeswitch-users@lists.freeswitch.org>
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Bcc: 
Date: Thu, 20 Feb 2020 17:29:02 -0800 (PST)
Subject: [Freeswitch-users] RTP not transmitting over NAT
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