The string "pfsensece280releaseamd64isogz" decodes to pfSense Community Edition (CE) 2.8.0-RELEASE (amd64) .iso.gz
If upd means you want to an existing pfSense 2.8.0 system: pfsensece280releaseamd64isogz upd
Users can now leverage internal firewall aliases—such as reserved and special-purpose networks—directly in their custom rules. Installation and "amd64.iso.gz" Explained pfsensece280releaseamd64isogz upd