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How to setup XP Pro as a
router
Q: If I had a Windows XP
Pro workstation with 2 networks cards in it, each
one on a separate physical network, can I use that workstation to route
traffic between the two networks. This is an existing situation on my
network and I'm trying to prove that it's a security risk. The workstation
is
connected a 172.20.x.x network and a 192.168.1.x network. If I'm at any
workstation on the 172 network I can ping the 192 interface on the
workstation in question but I can't go beyond that workstation. The same
holds true if I'm on the 192 network, I can ping the 172 interface of the
workstation in question but not beyond that. What has to happen on the dual
interface pc to route between the networks. I tried putting in static routes
in the route table using the "route add from DOS but that didn't seem to do
it. I've been told this is very simple.
A: What you are
experiencing is the expected behavior. You can modify this to allow
routing. On an XP machine this is done by editing the registry:
click Start/Run regedit ENTER
navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
In the right pane double click on IPEnableRouter and change its value to 1.
You are correct that machines on the respective networks will either need
static routes, or they could point to the XP machine's respective IPs as a
default gateway, or some other default gateway could be configured with
static routes.
Doug
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