I have a router with IP subnetting

On that subnet, a synology nas has an IP of and is running a VPN server using subnet

When I connect a client to that server from outside both networks, I get assigned From that client I can ping machines on ( for example) and &

From machines already on, I cannot ping the VPN clients.

I would like to have two-way access across both subnets. What do I need to do?

  • 1
    Add a route to via the Synology NAS ( – Cristian Ciupitu Aug 10 '15 at 16:23

Your clients need a route to (the network being used by your vpn clients). The easiest way to do this is to ensure that the default gateway for your network ( knows you to reach that network, possibly by setting up a static route to via your OpenVPN server. How to do this depends on your router; on Linux, that would look something like:

ip route add via

Alternatively, you can give each of your clients a static route to this network.

You will also need to ensure that our OpenVPN server is configured to route traffic between these networks (e.g., making sure that your firewall is configured to permit forwarded traffic from your network to the VPN network).

| improve this answer | |
  • Tried route add and got: C:\WINDOWS\system32\ROUTE.EXE: bad argument | Also I have this exact route in my router. – Enigma Aug 9 '15 at 20:15
  • I have no idea what the appropriate Windows command line would look like. I would start with route /? and Google, I guess. – larsks Aug 9 '15 at 20:15
  • I was using technet.microsoft.com/en-us/library/… – Enigma Aug 9 '15 at 20:16
  • Oops didn't specify arguments – Enigma Aug 9 '15 at 20:16
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    I'm not certain that you're going to be able to achieve your desired state by using the options available in the Synology GUI. It looks like many of the options that are available when you configure OpenVPN through the use of config files are simply not available in Synology. – austinian Aug 9 '15 at 20:38

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