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I am attempting to connect two networks using OpenVPN using Zentyal 3.3. I have followed the instructions on Zentyal's site, but my clients on Site2 can't ping my clients on Site1, although the VPN server on Site2 can ping the clients on Site1. I suspect this has something to do with routing. Here is the routing table for the VPN server on Site2:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface   U     0      0        0 eth0   UG    0      0        0 tun0   U     0      0        0 eth1   UG    0      0        0 tun0 UH    0      0        0 tun0 is the Internet-connected ethernet adapter on Site2, is the LAN on Site1 I want to be able to ping from Site2, is the LAN on Site2, and is the VPN network.

Here is the routing table from one of the clients on Site2:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface         UG    0      0        0 wlan0   U     9      0        0 wlan0

How can I get the clients on Site2 to connect with the clients on Site1? Thank you for any insight you have.

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1 Answer 1

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Check the "Advertised Networks" on the client connection for Site2 (in the Site1 server) and make sure it includes

It looks like Site2 is conection as what Zentyal calls a "Road Warrior" config rather than site-to-site.

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If I add it as an advertised route, I get this in the logs on the client machine: Mon Feb 17 14:31:40 2014 /sbin/ip route add via RTNETLINK answers: File exists Mon Feb 17 14:31:40 2014 ERROR: Linux route add command failed: external program exited with error status: 2 Again, I can ping from the VPN client on Site2, just not from any client machines on on Site2. – user1722919 Feb 17 '14 at 19:32
I misread your comment. I can now ping from clients on Site2. I had to change from a TUN interface to TAP, then add (like you suggested) to advertised routes. Thanks for your help! – user1722919 Feb 17 '14 at 19:52

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