Case project! Your friend has a small design shop with Windows NT 4.0, Windows 2

Question

Case project!
Your friend has a small design shop with Windows NT 4.0, Windows 2000, and Windows XP workstations. He has one older Windows NT computer acting as a file server and a Linux computer running as a firewall on the DSL line. Previous to the current network setup, your friend’s shop used what he assumed was the default Windows networking scheme-NetBIOS over NetBEUI. Now a new client wants your friend’s shop to log on to its WINS server so they can share resources more directly. With security in mind what do you tell your friend to do? Why? What are his (and his client’s) alternatives?

Please provide references if possible.
thanks :)

Explanation / Answer

First off, tell your friend to toss that crap. His environment is all legacy, and will be incapable of running for much longer. Anyhow... The problem lies in the previous IP addressing scheme. Even after solving the security issue with a site-to-site VPN, since WINS is a name to IP address mapping scheme for a small amount of hosts, there is the possibility that there will be overlap between the two offices. In this case you'll need to use a NAT scheme, masking the remote offices IP's behind an unused one. Another (simpler) option would be to suggest that the client share resources on the NT file server. This would allow for centralized credentials, and wouldn't necessitate configuring a complicated NAT setup.

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