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WebRTC Metrics

A comprehensive overview of WebRTC statistics, derived indicators, and observable signals, to better understand call quality, connectivity, and user experience in rtcStats

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connectivity

UDP blocked

The connection requires to use TCP or TLS because UDP is blocked.

Description

In restrictive networks, firewalls often block UDP traffic. In this case WebRTC default UDP traffic is blocked, and traffic will end up going through TCP or TLS.

What do we do here?

In the case, there is a STUN or TURN configured for UDP, we check if we received a srflx candidate. If not, we mark an observation.

Notes

  • When UDP is blocked, you route traffic via TCP or TLS. In such cases, you can expect suboptimal media quality when the network exhibits packet losses