On Wed, 16 Mar 2005 05:16:05 -0800 (PST), Bhagwan Kadia
<kontaktbhagwan at yahoo dot com> wrote:
> 
> I have downloaded the latest version of monowall from http://www.m0n0.ch/wall/downloads.php
> 
> And now configuring it for providing the monowall to monowall connectivity with VPN.
> 
> The scenario is
> 
> Office a
> 
> -monowall is installed on a machine with two nic cards
> 
> -nic 1 has ip address 192.168.2.1 (LAN interface)
> 
> -nic 2 has ip address a.b.c.d (WAN interface) (Its routing is done through the router, if we
configure it on a machine we are able to browse the internet)
> 
> Office b
> 
> -monowall is installed on a machine with two nic cards
> 
> -nic 1 has ip address 192.168.3.1 (LAN interface)
> 
> -nic 2 has ip address w.x.y.z (WAN interface) (Its routing is done through the router, if we
configure it on a machine we are able to browse the internet)
> 

Your setup sounds fine from the routing perspective.  No 1:1 NAT, no
static routes, nothing other than a very basic default setup.  Then
follow this to setup a site to site IPsec VPN. 
http://m0n0.ch/wall/docbook/ipsec-tunnels.html

-Chris