Does the client attempt to access a service using NetBIOS-over-TCP/IP on the other side of the router?

In order for a client to find a NetBIOS name on the other side of a router, it must have the ability to map an IP address to that NetBIOS name. You can accomplish this by using static tables, Windows Internet Naming Service (WINS), or Enterprise Name Server (ENS) to configure the client to resolve the service name to its associated IP address.