VPN (win serv 2008 r2) How to see VPN connection clients in the network environment (server)?

Question

VPN

There is a server with a static IP VPN Server Windows Server 2008 r2
It has a VPN server with PPTP protocols.
Roles installed on the server:

• DHCP 192.168.1.3 - 50 with ISP DNS
  
• NAT, router, VPN server (ip 192.168.7.1 - 25)
  

How to see the computers of the working VPN network by name?
OS VPN Clients Windows XP

Answer 1

Keyword - WINS server
PS: There is another wrong option - to allow broadcast traffic to go.