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Browse All TopicsI am running windows XP and I have several network connections (such as LAN1 - over the wired network card, LAN2 - over the wireless card, etc).
How can I route a certain application's traffic though a given network connection?
For example Mozilla Firefox though LAN 1, Internet Explorer through LAN2, Yahoo messenger on LAN3.
I thought I might be able to do it by using a local proxy server but then I was unable to make the proxy server use a specific connection. I guess it's the same problem after all.
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by: pseudocyberPosted on 2008-01-13 at 06:25:09ID: 20647740
At first, I was going to say you can't.
You would only be able to route traffic to ServerA through your wired, and ServerB through your wireless assuming ServerA and ServerB are on DIFFERENT networks. However, you're controlling routing by the destination IP, not by the application type. So, IE could go either way depending on which destination it was trying to get to - same for Firefox.
What you're trying to do can be done on some expensive and complicated pieces of equipment - google "application layer firewalls".
If you can do it (I haven't tried) it would be a firewall running on your pc - which is application aware. You would have to have all your network connections set up, and they would still have to be on different networks - but then, your pc knows how to get to everything, right? So you could have your networks set up, your firewall software running (like Windows, BlackIce, Symantec, etc.) and then you open your app and try to ge it to hit ServerA. You should get a message about "AppA is trying to get to ServerA - do you want to allow this?" and click on Yes. Then, you try it with illegal appB to server A and you respond no. And so on.
This is the closest you're going to get to doing what you're talking about, restricting applications instead of networks & hosts.
Hope this helps.