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?


migrated from serverfault.com May 19 '13 at 17:17

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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 May 19 '13 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 May 19 '13 at 11:37

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.

  • 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 May 19 '13 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 May 19 '13 at 21:23
  • Indeed it won't. There is no mechanism for that. – Falcon Momot May 21 '13 at 21:50

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