STUN server: Is it really necessary?

[ralg]

Hi all!

In a deployment where WebRTC clients do always connect to a Media Server and that media server has a public IP address (i.e. media always flows through a media server and never peer-to-peer), do we still need a STUN server? Clients will always be able to connect to media server.

3 )Media server has a public IP address.

I understand that if the client is behind a firewall blocking UDP traffic, a TURN server is required in order to relay media over TCP/TLS. But if we "ignore" this scenario, is it completely safe to say that the STUN is completely unnecessary? 

Thanks for your help.

[davidsw...@gmail.com]

If the user's router provides her browser with only "private" IP numbers, your server will not be able to send any media to her. She would need either an srflx or relay candidate.

[Roman Shpount]

Yes, it is safe to say STUN is not necessary. Furthermore, if you add ICE TCP support (RFC 6544) to your media server, TURN is not needed either. You would only need TURNS for a few cases where only TLS traffic is unblocked.