Re: [Openvpn-users] Re: Issue routing among three VPNs

[Borja Pacheco <bpacheco@xxxxxxxxxxxx>]

Summon up to all questions you have made me (thanks in a lot to everybody!)

a) I'm using this version of the package openvpn-1.5.0-46.
b) In my scenario I'm using two different interfaces at Host A (tun0 and tun1, so when a packet it's sent from Host B arrives from tun0 and then latter it should be sent to Host C over tun1)
c) Routes are introduced into the clients (Host B and Host C) through the client.up script.

Here's the configuration for the host B....
#!/bin/bash
# Route to Office A
route -A inet add -net 172.16.0.0 netmask 255.255.240.0 gw $5
# Route to Office C
route -A inet add -net 172.16.16.0 netmask 255.255.240.0 gw $5

here is a summon of the routing table at host B.....
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
172.16.1.2      0.0.0.0         255.255.255.255 UH    0      0        0 tun0          ---> Host A's virtual address
172.16.16.0     172.16.1.2      255.255.240.0   UG    0      0        0 tun0        ---> Route to office C
172.16.0.0      172.16.1.2      255.255.240.0   UG    0      0        0 tun0         ---> Route to office A

This is made, in the same way, for node C

traceroute arrives host A, but it does not follow up..... 

El mié, 03-11-2004 a las 14:16 +0000, Kurt escribió:
> Borja Pacheco <bpacheco <at> acisa.com.es> writes:
>
> > 
> > 
> > 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!!! 
> > 
>
> Hi Borja,
>
> do you use two different tun interfaces on your Host A (like tun0 and tun1) or a
> single one? 
> Kurt
>
>
>
>
>
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