A: The DVD Image (ISO) is best for use in virtual machines or for burning to a physical CD/DVD. The USB Memstick image (which ends in .img.gz ) is designed to be written directly to a USB flash drive to create a bootable installer.
After installation, you'll need to configure pfSense: pfsense 251 download iso link
For customers running official Netgate hardware or those with active support contracts, Netgate can provide specific legacy factory images. Log into the or Global Support Portal . A: The DVD Image (ISO) is best for