Forward Packets from one interface to another

[guest27242]

Hello everyone,

Here is my situation.

My LAN network: 10.1.0.0/16.
The client is asking us to establish IPsec connections using a custom IP subnetwork: 10.100.0.0/28 as a Local subnet.
I created a new VLAN with a 10.100.0.0/28 subnetwork and I configured IPSec VPN to the client environment. The VPN connection is working properly and I am able to ping the client machine via OpnSense GUI and using the newly created interface.

Here is the tricky part.
How to configure access from my LAN network to the client machine. I must be able to Forward packets from LAN to the custom interface and then NAT traffic on the custom interface in order to send it through the VPN line. How to do that?

Thank you in advance!