STUN server down?

[TSDKen]

I woke up this morning to some error messages and after restarting the server, I have this message:

• STUN server stun3.3cx.com:3478 could not be reached (host name is not resolved). It could be that the STUN server you are using is down or a network problem is preventing STUN resolutions. This might cause problems if you use VoIP Providers.
  
  SIP Server ID: 12295 10/28/2021 9:23:51 AM

My ios app is having problems connecting.

 

[ChrisC_3CX]

Are you still facing this issue? the specified server is up and running so it should be fine. The fact that you get a message "host name is not resolved" may mean that the issue is related to the DNS server you are using.

Also, even if it were down the iOS App should've still worked as it does not use the Stun servers.

Could you provide more information about this instance such as where it's hosted, on what OS, and what version it's running. It would be also good if we knew if you're having issues with other 3CX Apps too such as the 3CX Webclient, Windows App, Android App and if they have anything in common such as all being on the same network, etc.