This is our experience running a WebRTC-based service that tries hard to do peer-to-peer when possible. It's usually possible, except for people behind enterpri

This is our experience running a WebRTC-based service that tries hard to do peer-to-peer when possible. It's usually possible, except for people behind enterprise (big company) firewalls. But there is a big exception -- mobile networks. Mobile data networks don't allow udp hold punching. You have to relay the media.