Solved IP Routing help needed

February 9, 2014 at 10:43:56
Specs: Windows 7

I recently was asked by a friend to perform a task that turned out to not be as easy as I thought. Here's a diagram of what I'm working with:

So what he asked me to do here is get 2 specific Company B workstations to be able to access Company A's Windows Server.

All the workstations (there are more workstations at both companies than what I showed in the above diagram of course) and the 2 servers are running Windows. I tried messing around with the 'net route add' command, but was not having any success.

It seems like this should be easy but my limited IP routing knowledge is really showing here. Was hoping someone could help me out a bit.

message edited by domiflichi

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February 9, 2014 at 12:31:07
Your friend should hire someone who knows what he's doing. This involves firewalls and VPNs and all sort of security questions. And then there's the question of domain trusts.

If your friend works in the IT department then he should know how to do it. If he doesn't then he should make sure that his CV is in order.

I predict that if you and your friend persist in this without professional help then both companies networks will be infiltrated by hackers in no time.

PS. I've just noticed that the servers are using non-routable addresses. Have fun!

message edited by ijack

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February 9, 2014 at 13:33:07
✔ Best Answer
Given the layout in your diagram it's extremely easy to accomplish this without any special routing.

Since both networks are physically connected to the same switch, all you need to do is statically assign 2 IP addresses (1 for each network) to the interface on both of the computers.

That's not the best solution, especially security wise, but it is the easiest.

You will also want to consider what adjustments may be needed to deal with DNS resolution.

message edited by FishMonger

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February 9, 2014 at 13:42:29
It's a pretty unusual situation to have two different companies connected to the same switch. In fact it's unbelievable.

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February 9, 2014 at 13:48:31
I agree and that's part of the reason I qualified my answer by beginning with "Given the layout in your diagram".

In the real world they would not be physically connected, which leads me to think that this a poorly devised theoretical question for a class assignment.

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February 9, 2014 at 15:43:53
Assigning the NIC 2 IP addresses sounds like a great idea! Thank you...I totally forgot that you can do this.

I know this is a highly unusual situation. The reason that these 2 companies are connected to the same switch is because the way the companies are actually related to one another, and how they expanded in the building they're running out of. I know it's no excuse, but I've had no control over the situation. I've told them that the way they are setup is far from ideal, and what they really need to do is have separate cables ran for the separate companies.

I'm probably going to get reamed for this, but I would say they are not overly concerned about security as both companies are small, and tight-knit at the moment.

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