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What is a Relay Server?


By default Sync does its best to establish direct connection between peers to achieve maximum speed. However, if direct connection is not possible due to Sophisticated NATs, firewalls, proxy servers, etc. this option will allow Sync to establish connection to Resilio relay server, which will allow to transfer data without direct connection. This can impact the speed at which the files sync.

To enable the Relay Server option, select the folder preferences and make sure the 'Use Relay Server when Required' option is checked. When Sync detects that a Relay server is needed, it will make the appropriate connection with the Relay Server, allowing you to connect to your peers.



When a peer is connected through a relay server, you will see the "Relay server" icon  next to that peer in the Peer list

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