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VPN server and client are using the same IP but in different subnets

Q: I have the following situation. I would like my home uses to connect to the
office via VPN. My home users have the internal IP address range of 192.168.0.X/24
and my office has the address range of 192.168.x.x/16. I know that you
cannot have the exact same IP address range so I have separated the two by
their subnet mask. Will this approach work or will I have to use a 192.168
and 10.10.

I am using W2K3 and PPTP

A:
In the most cases, if they are in the different classes, you should be able to establish the VPN. However, the routing table may be confused if both sites have the same IP. For example, if each site has one computer using 192.168.0.254, the route will send the packets to the local one while you want to access the remote one.

However, you may have two options. You may modify the routing table to make one (VPN client) to one (remote computer) routing. Or setup IPSec VPN.

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net

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