Re: [Shorewall-users] VPN routing on a 1 NIC router

[Peter L. <pe...@li...>]

On Mon, Aug 29, 2011 at 00:58, Tom Eastep <te...@sh...> wrote:

>
> On Aug 25, 2011, at 1:37 PM, Peter Lindeman wrote:
>
> I have a linux system running with 1 nic. (just local LAN) A Fritzbox is
> the DSL router, because of services of the Fritzbox (voip etc) I have to use
> the Fritzbox as the DSL router.
>
> Now I want to use the linux system as a VPN router so other devices on the
> local lan can use that VPN connection.
>
> I have setup shorewall but I cannot get it to work. I have monitored the
> traffic with Wireshark and when I for instance try to open a webpage over
> the VPN connection I see a SYN packet being sent into the tunnel. I see a
> SYN ACK returning via the VPN but there it ends, the SYN ACK is not being
> sended to the machine on the local lan.
>
> Anybody has an idea where to look or what ever other information do I need
> to post to make more clear what is going wrong?
>
>
> Please see http://www.shorewall.net/support.htm#Guidelines for the
> information we need to diagnose connection problems.
>

The solution to my problem was a simple one.

The problem was that I ḧad the wrong interface in the masq file. Instead of
the VPN tunnel device I had the ethernet nic in it. I changed that and now
it is working as expected. Stupid mistake, my excuse ;-)

Greetz
Peter Lindeman