The NAT method use your firewall that able to forward TCP packets to the proxy port.
This method is a simply method to hook HTTP traffic to forward it.
On Your Proxy section, choose listen ports link.
- Click on “New Port“
- Enable the Firewall NAT compatibility option.
- Define the listen port.
- Click on Apply
- On the main table, click on “Apply” button to make port available.
- After Apply, you should see the port green and available to receive requests from your Firewall