# Federation Multiple instances can reach each other by using their instance name as domain name to allow for testing federation between instances. For example, if you have a `rover-beavers` and `splendid-couch` instance, you can create a federated share from the `rover-beavers` instance to `http://admin@splendid-couch`. If the proxy is setup with HTTP, you can use HTTP between the instances by using the full proxy URLs. For example sharing to `admin@splendid-couch.haze.example.com`.