Port Forwarding means to forward request through a specific port to the required Destination called port forwarding.
We can explain port forwarding with a reliable example.
If you want to remote any system that outside from your network then you can select MSRDP port and target our request to the destination with public source Interface.
According to the Pfsense I can explain with little bit description and print screen that will help to solve your port forwarding issue quickly. Follow instruction step by step.
1- First we need to select NAT option under Firewall tab.
2- Add rule here after hitting on “+” sign
3- In this page we will add
Destination Port Range(From: MS RDP TO: MS RDP)
Redirect Target IP ( Machine Ip that we want to Access)
Redirect Target Port( MS RDP)
Save and Apply changes
That’s all for port fording in PFSense. I attaché here print screen for more help.If we have multi wan in network then we can add more rules under firewall tab NAT option. This way we can reduce the down time .