IPSec Net-to-Net Routing all Internet-Traffic

Hi :grinning:
I need the following configuration:

LAN1 [IPFire1] - IPSecTunnel - [IPFire2] LAN2

The IPFire1 should handle all Content Filtering, so that the Clients of LAN2 go via IPFire1 to the Internet. All Traffic from LAN2 should be routed via IPFire1 in LAN1.
I there a way to do that? If not with IPSec, could be OpenVPN N-t-N the answer?
I have no servers or anything in LAN2, so I don’t neet any portforwardings to services in LAN2.