PfSense between Proxy and LAN

[misurex]

Hi,

I cannot figure it out how to connect the 192.168.40.x subnet to the 192.168.10.x subnet using pfSense2.

The www servers behind the Proxy need to be able to connect to the database and other sources (a FreeNAS server, etc).

Please help me out with this problem. I attached the design of my network.
Thank you very much.