# No audio in conference from external call

**URL:** <https://wazo-platform.discourse.group/t/no-audio-in-conference-from-external-call/1663>\
**Category:** Installation/Configuration\
**Created:** [June 25, 2025, 7:25am UTC](https://wazo-platform.discourse.group/t/no-audio-in-conference-from-external-call/1663 "2025-06-25T07:25:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Artek](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@Artek](https://wazo-platform.discourse.group/u/Artek)\
**Post date:** [June 25, 2025, 7:25am UTC](https://wazo-platform.discourse.group/t/no-audio-in-conference-from-external-call/1663/1 "2025-06-25T07:25:00Z")

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Hello,

I have a wazo 25 server installed in a virtual machine, serving for the conference. This virtual machine works without any problems on a dedicated server.

I want to open it out of the home network for testing. I have activated all the necessary ports 80,443, 5060, 10000-20000 from the router and even activated DMZ. There is no problem over the local ip, but users accessing from the external ip can enter the room, but they cannot speak or hear.

When I check with sngrep on the server, there is rtp traffic but via local ip I think.

I set these in the SIP template I use.

force\_rport yes

rtp\_symmetric yes

rewrite\_contact yes

From Wazo ui panel, I also set these for udp in PJSIP Transportation settings.

external\_media\_address

external\_signaling\_address

local\_net

However, the problem still persists.

Thanks in advance for your help.

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<div class="post-metadata">

**Author:** ![julienfr](https://yyz2.discourse-cdn.com/free1/user_avatar/wazo-platform.discourse.group/julienfr/32/797_2.png) [@julienfr](https://wazo-platform.discourse.group/u/julienfr)\
**Post date:** [June 26, 2025, 7:18am UTC](https://wazo-platform.discourse.group/t/no-audio-in-conference-from-external-call/1663/2 "2025-06-26T07:18:35Z")

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Hello,

Do you have a STUN/TURN server ?

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<div class="post-metadata">

**Author:** ![sduthil](https://avatars.discourse-cdn.com/v4/letter/s/e56c9b/32.png) [@sduthil](https://wazo-platform.discourse.group/u/sduthil)\
**Post date:** [July 4, 2025, 2:52am UTC](https://wazo-platform.discourse.group/t/no-audio-in-conference-from-external-call/1663/3 "2025-07-04T02:52:00Z")

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On the firewall, did you open 10000-20000 UDP?  
AFAIK, you don’t need to open 80/443 for SIP phones.  
Assuming that your Wazo server is behind a NAT (i.e. it has a private IP address that is different from its public IP address), make sure that `external_media_address` and `external_signaling_address` contain the public IP address of the Wazo Platform server. Also make sure that the `local_net` looks like `192.168.0.0/24` and that it covers only the local IP address of the server and _not_ the public IP address.

If it still does not work, you’ll need to share a network capture with `sngrep` to diagnose the issue.