Routing trough IPSec to segment behind firewall

[thuizt]

Hello,

We have 3 pfSense firewalls routed behind one another.

10.1
A    -  B    -    C
192  10.0      172

There is an IPSec tunnels between A and B and a subnet (10.1) between B and C
Now we want to route from A to C.

Firewall A should have a static route to the 172 subnet through the gateway  on subnet on 10.0
However as this is a IPSec tunnel I cannot add the gateway as the 10.0 gateway lies outside the 192 subnet.

Is this not possible or am I overlooking something.

Any help greatly appreciated.

Thanks

[cmb]

Add a matching phase 2. IPsec doesn't route, traffic has to match the P2 local+remote.