Hi - in the Akka M4 release the documentation for 'remoting' states that in order to configure host and port the following configuration block should be used:

akka {
  actor {
    provider = "akka.remote.RemoteActorRefProvider"
  }
  remote {
    transport = "akka.remote.netty.NettyRemoteTransport"
    server {
      hostname = "127.0.0.1"
      port = 2552
    }
 }
}

Using this will not work. The hostname/port properties are in the 'netty' namespace. The following will work though:

akka {
  actor {
    provider = "akka.remote.RemoteActorRefProvider"
  }
  remote {
    transport = "akka.remote.netty.NettyRemoteTransport"
    netty {
      hostname = "127.0.0.1"
      port = 2552
    }
 }
}