Networking

Learn about the multiple protocols that Relay supports for multiplayer communication.

Read time 1 minute

Last updated 5 hours ago

Note

WebSocket is only supported on UTP 2.0.0-pre.3+.

The Multiplayer Services SDK uses the underlying Relay service to allow players to communicate over several different protocols, including UDP, datagram TLS (DTLS), and secure WebSocket (WSS). After allocation to a Relay server, clients talk directly to the Relay server using one of the aforementioned protocols. Relay BIND messages are further authenticated through HMAC signatures. The Allocation service relies on the Unity Authentication service and HTTPS encryption.

WebSocket connections allow for multiplayer connectivity on browsers using WebGL.

Sessions and networks

Learn how sessions coordinate network setup, startup, and player connection flow for multiplayer games.

Ports and protocols

Required ports and protocols for using the Relay service.

Location and regions

Explore the available Relay regions and learn how to select the best one for your players.

Quality of service

Use Quality of Service measurements to automatically select the best Relay region for your players.

Scaling

Learn how Relay automatically scales to meet user demand without additional cost.

DTLS encryption