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Configuring two NICs to isolate networks

By rr1713 ·
How do I configure a dual NIC card XP Professional workstation to separate private networks. Specifically, I want to deny users from either network accessing users/computers from other network. I have two servers (Win2K Server) that need to request and send information between back and forth.

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Configuring two NICs to isolate networks

by Siphter In reply to Configuring two NICs to i ...

You shouldn't experience traffic from users of one subnet on another, provided they do not have a routing table entry to your other subnet. If they are windows OS based clients, you can clear this through logon script or group policy (provided theyhave ADSI installed if they are NT or 9x).

As for your servers, the two of them can contact each other through your XP machine with the Dual NIC.

One the XP box, make this registry entry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

IPEnableRouter 1 (if 0 set to 1)

For the example below let's say the machines have the followinf IPs:
XP box: 10.10.10.11 & 13.13.13.12
Server1: 10.10.10.10
Server2: 13.13.13.13

On the 2 servers you will have to edit the routing tables as follows:
Server1 (from command prompt)
route ADD -p 10.10.10.10(destination ip on server2) MASK 255.255.255.255 10.10.10.11(NIC on XP box on the same subnet) 1 (the interface)

Server2(from command prompt)
route ADD -p 13.13.13.13(destination ip on server1) MASK 255.255.255.255 13.13.13.12(NIC on XP box on the same subnet) 2 (the interface)

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Configuring two NICs to isolate networks

by rr1713 In reply to Configuring two NICs to i ...

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Configuring two NICs to isolate networks

by Uch In reply to Configuring two NICs to i ...

Pls close this question, Answer1 has adequately solved the issue.

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Configuring two NICs to isolate networks

by rr1713 In reply to Configuring two NICs to i ...

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Configuring two NICs to isolate networks

by rr1713 In reply to Configuring two NICs to i ...

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Configuring two NICs to isolate networks

by rr1713 In reply to Configuring two NICs to i ...

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