I have a problem, and the IT guys at work are too busy to figure this out, so me and my contact overseas are seeing if this is possible.

I have a computer that needs to send/receive information to an IP address in another office that isn't part of their main network. They have a computer in the office that is on the local network, which we have an open vpn to, and has a second NIC attached to that same network as the IP I want to hit. And I don't know if it makes it any more complicated, but My PC is looking at specific port numbers.

How can I use that computer to route my information through to the other network? I'll give some exapmle IP's to try and keep out confusion. I'm guessing NAT? maybe port forward? I don't really know the right answer or quite how to implement it.

My PC - 11.x.x.x port 5 in/out

Their PC - NIC 1: 22.x.x.x
NIC 2: 33.x.x.x

Destination - 44.x.x.x port 5 in/out

8/7/2009 4:34:54 PM

You have 4(5w/vpn) subnets. you want 2. VPN will override 2. It will make yours and their PC have the same subnet if you do it right. Now, since the destination is a different subnet from i presume the vpn and their nic 2, you need to have a router on your end saying hey i need to go through subnet 33/8 to get to subnet 44/8, and maybe one on their end as well saying this.

And if you have this complex of a network, why dont you have IT guys for this??

[Edited on August 8, 2009 at 7:08 AM. Reason : .]

8/8/2009 7:07:48 AM

You can setup a persistent route on each of the systems as a hack. Basically saying "If you see data that needs to be sent to IP X.Y.Z, send it to through this gateway/route rather than the default gateway/route". Again, this is hack only (and works, as I've used myself for setting up test systems), but if this is something that needs to be in place longer term, the real solution is to configure routing on your network routers to handle this sort of thing. Not sure who your "IT guys" are, but if they have a lick of knowledge, this should be trivial for them to configure / setup.

Otherwise, if there are other political factors in the picture, and you REALLY don't want to work with the IT guys, lookup software-based VPN solutions (rather than network-based) in Tech Talk threads. I haven't used it before, but I think Hamachi would work well here based on my understanding of it.

[Edited on August 8, 2009 at 8:46 AM. Reason : .]

8/8/2009 8:46:06 AM

super easy way?

try installing hamachi.

8/8/2009 9:45:24 AM

master_yoda: yeah that's kind of the conclusion I came to. And we do have IT guys, the problem is the company is growing fast, and they don't have anyone that can jump into a sudden issue, everything has to go through a queue even if there isn't time for it. Hence I usually end up figuring out some patchwork way to get by until they can get a hardened way.

Perlith and Schpenxel: Yeah the problem isn't that it's trivial, it's just that they have a list of things to do before they can get to other items, which leaves me trying to make temp patches. If they would just give me admin control we have a VPN router I could probably use to setup everything in 2 seconds, but we have a single IT admin in the US and a few in the UK, not sure how many. So I'm stuck waiting for the 1 guy to get his work done because I don't have authority to make those changes. Really F*d up if you ask me but whatever.

Anyway, as much as I would love to try the hack, I would probably be better off seeing if hamachi would be able to accomplish what I want to do simply. Still let me know how I would do that cause I might just try that at home for fun.

Also, thanks for all the responses.

8/8/2009 5:21:33 PM