Proxmox KVM openBSD pfSense NAT

Proxmox Version: proxmox-ve-2.6.32: 3.3-143 (running kernel: 2.6.32-35-pve) 
Pfsense Version: 2.2 

First Download the file and unzip it to get the ISO file
Upload the file to your Proxmox Server

In Proxmox Create a VM

Important before you start the Virtual Server you have to add a second Network which you have defined before in Proxmox Network