The register type used by the client .
Only the interface type is client, it can be used.
undistributed: If a client send a packet to the client with
this configuration, setver will only forward the packet whitout
sending redirect packets.
forward: The client with this configuration will only send packets
forwarded by server, which means it can not initiate to build
a session with other clients.
undistributedandforward: The client with this configuration have
the characteristics of both 'forward' and 'undistributed'.
normal: The client with this configuration can build session with
other clients without any restriction.