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I have an ssh tunnel from my home router (R) to a VPN (A). Can I setup another tunnel from another VPN (B) to my home router (R) in a way that traffic from VPN A to VPN B will be tunneled? I'm looking for the following A <-> R <-> B.

My final goal is to have a direct port to port connection between the two IPs.

Is it possible? Can you give me some tips on how to do it?

Thanks

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  • Should be possible, do you want to forward all data from A->R->B without prejudice? Should be able to create a rule for this after the tunnel is established. Is this a stock router, or something like DDWRT?
    – David Houde
    Commented May 19, 2013 at 11:17
  • Yes, without prejudice both ways. I have a weak version of DDWRT but it has port forwarding. What IPs do I specify in the port forwarding rule? External VPN IPs? They're shared between the whole networks.
    – Vladimir
    Commented May 19, 2013 at 11:37

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Yup, indeed you can, and this is one of the things a router is for (routing traffic between different networks).

If the VPN on the other end isn't set up to let you route your own subnets (most aren't, but there is a feature for it; setting it up is a little complex), you may have to do NAT between the different VPN networks so all the hosts appear to be your router when traffic goes over the VPN.

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  • In my situation, I have no way of configuring the VPN networks. I have control only over my router but I don't see what the steps would be to make it work. 1st thing I have to open the tunnel between A and R and also B and R. Say I open it on port 443. What do I have to do on the router to make it work?
    – Vladimir
    Commented May 19, 2013 at 19:56
  • I mean I can't just put VPN's external IPs and the ports to forward. This won't work right?
    – Vladimir
    Commented May 19, 2013 at 21:23
  • Indeed it won't. There is no mechanism for that.
    – Falcon Momot
    Commented May 21, 2013 at 21:50

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