cPanel hehind pfSense

Dear Experts, I hope you are doing good. I am trying to configure my cPanel behind my pfSense box but I am not able to complete the configurations. What I did is as below. 2 Interfaces LAN/WAN Port forwarding for all posts to internal IP which is used by cPanel Server external NAT is as per default settings. but when I try to access my domain which is hosted on cPanel it refuses the connection. if I try to access WHM on port 2087 it works fine. I hope you will help me in this regard. Waiting for your reply. Thanks & Regards. Ali.