1:1 NAT firewall using pfsense Rumi, October 19, 2015October 19, 2015 Assuming you are planning to setup your server infrastructure behind firewall- pfsense. You have a Public IP- 114.130.56.x to be pointed to your private lan server with 192.168.14.x. Let’s begin- Step-1 Adding public IP to the WAN interface “Firewall > Virtual IPs ” as below- Step-2 Now move on the “Firewall > NAT > 1:1” menu as below- Step-3 Next move on the “Firewall > Rules > WAN” as below and add a rule- Destination “Type” Single host or Alias” put the <LAN server IP>/31 If you want to allow “any” port between WAN and LAN select “Destination port range” as ‘from: any’ ‘to:any’. Otherwise create your firewall rule as your own requirement. Administrations Configurations (Linux) pfsense