https://community.sophos.com/sophos-xg-firewall/f/discussions/131738/firmware-validation-failedCurrently on firmware version XG310 (SFOS 17.5.16 MR-16-Build830. Want to upgrade to v18. Downloaded firmware from Sophos Licensing Portal: file: HW-18.0.6_MR-6.SF300-655 Followed the procedures and steps documented here: https://docs.sophos.com/nsg/sophosen-USTelligent Community 12