33 lines
1.1 KiB
ReStructuredText
33 lines
1.1 KiB
ReStructuredText
.. _relaying:
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Relaying
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========
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.. versionadded:: 0.12.0
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Syncthing can bounce traffic via a *relay* when it's not possible to establish
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a direct connection between two devices. There are a number of public relays
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available for this purpose. The advantage is that it makes a connection
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possible where it would otherwise not be; the downside is that the transfer rate
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is much lower than a direct connection would allow.
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Relaying is enabled by default but will only be used if two devices are unable
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to communicate directly with each other. When connected via a relay, Syncthing
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will periodically retry a direct connection and, if one is established, stop
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communicating via the relay.
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Security
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--------
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The connection between two devices is still end to end encrypted, the relay
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only retransmits the encrypted data much like a router. However, a device must
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register with a relay in order to be reachable over that relay, so the relay
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knows your IP and device ID. In that respect it is similar to a discovery
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server. The relay operator can see the amount of traffic flowing between
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devices.
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Running Your Own Relay
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----------------------
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See :ref:`strelaysrv`.
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