Browser service cached information about other networks

Most of our users are mobile users and work at client's offices about 50% of the time. When they return from clients office and plug back into our network they seem to broadcast the work group or domain name and sometimes computer names from the clients office.  For example, if a client went to work at ClientX and then returned to the the office, you can see client X's domain name in network neighborhood.  You are unable to access the domain of course.  This has been happening for a while and I always just assumed it was cached information from the workstation being broadcasted to our network.

Recently a user was working at a clients through VPN and the client's IT staff made them close VPN because they could see our internal domain name and list of computer names from their machines.  They could not access the machines but could simply see them in network neighborhood.  

Is there a way to stop this from happening?  Can I keep other domain names from showing up in our browse list and also keep our browse list from being broadcast to other networks when one of our machines is connected?  We are using a Cisco VPN.  
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Disable the computer browser service on the clients (Not needed in a domain).

And disable WINS/NetBT name resolution

1. Open Network Connections.

2. Click the Local Area Connection to be statically configured and then, from the File menu, click Properties.

3. In the list of components, click Internet Protocol (TCP/IP), and then click Properties.

4. Click Advanced.

5. Click the WINS tab.

6. Click Disable NetBIOS over TCP/IP.

Optionally, you can select Use NetBIOS setting from the DHCP server if you are using a DHCP server that can selectively enable and disable NetBIOS configuration through DHCP option types.


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