How Connect to 2 Servers at the same time [UNet]

I want create a Master Server to display all User Servers and User Infos.

I want that the User is connected with the Master Server even he join a Server from the User.

This means i need to hold 2 Connection from different IP's and Ports alive, so how can i do this?

Do i need create a own NetworkManager or is there any good source out there?
I was thinking just create a Gameobject and put there a network manager on it and spawn this as player in the master Server but i don't know if this is working and it don't solves the problem of having only one Server connected.

 

I'd try using NetworkServerSimple for the master server. I use it all the time from the other end, where my game simulation servers all have connections to other servers using that, but I would expect it to work for clients as well.

 

Can you still use SyncVars and ClientRPC and Commands and the network identity with this NetworkServerSimple?
And how do i spawn networked objects in this Server?

Oh i see you can use something like MessageBase to communicate in NetworkServerSimple and send also messages to spawn objects over the network