PfSense IPSec on Dual-WAN setup. How to forward IPSec?

[muellinger]

Hi.
I have a MultiWAN Setup using 3 pfSense boxes. LoadBalancing is NOT enabled and IPSec should be used only over the main WAN.

	pfSense 2 PPPOE 
	LAN IP: 10.1.0.2
	static WAN-IP <-------> IPSec forward to 10.1.0.1 possible? <--------------> SonicWall
	|			
	|
WAN1: 10.1.0.1
pfsense 1 GW
WAN2: 10.2.0.1
	|
	|
	pfSense 3 PPPoE
	LAN IP: 10.2.0.2
	static WAN-IP

As you can see id like to have the pfSense 1 GW to be the IPSec "Server". I tried to configure it the standard way, but of course
the pfSense 2 has to be told to route this to pfSense 1. How do i have to do this? I tried many different configs and NAT Settings but i could not get the VPN to connect. Both Firewalls have identical IPSec Settings. :-/

I could not find any further info here.

Thanks for your help!