[Openvpn-users] Issue routing among three VPNs

[Borja Pacheco <bpacheco@xxxxxxxxxxxx>]

Dear all,

I've configured my network using OpenVPN to establish connections among different offices (nowadays three ones).

The topology is based on an star, with a central hub in the main office, which serves VPNs (OpenVPN Server) to the others offices (which acts as OpenVPN clients, using fixed IP addresses).

Graphically:
Host B <---OpenVPN Tunnel---> Host A <---OpenVPN Tunnel---> Host C

Host A, is located into our main office, and it's a quite complex firewall attached to several subnetworks.

Tunnels works fine when, from Host A (or its subnetworks) I try to reach any host located at office B or C, or viceversa (from B or C to A).
The problem arises when I try to reach hosts from B to C (or C to B).  

Host A forwards packets fine, and I noticed that this issue only happens when routing from a tun device to another, when I route to another subnet which is attached to an standard ethernet device, everything works fine.

Does anybody knows if exists a limitation on it? is it a configuration issue? Any idea?  :S

Thanks in advance!!!