Failed By ICE Keep alive

[lalit]

I am facing same issue in RHEL 7.5
stun_freshness_timeout=1000000000 did not work.
It seems it is a bug in flashphoner that displays when run on a RHEL
I have running version 5.0.3406

 

[Max]

First of all check default UDP ports [31000-32000].
It should be open.
How to check UDP ports:
https://docs.flashphoner.com/display/WCS5EN/Accessory+tools#Accessorytools-Portroutingchecking