Here in this article i will suggest you to how to resolve the error “Appliance Not Detected” error in sophos XG firewall.
If you are installing wrong ISO in the wrong device you will get this error.
HW-SFOS ISO should use for hardware appliance.
SW-SFOS-ISO should use for vmware appliance.
In case if you are using in reverse way then we will get that error.
You can download both the ISO files from this URL: “https://id.sophos.com/” My applications>>My Sophos >> Network Protection >> Download Installers
Here is the hardware ISO:
Here is the software ISO
Here in this sophos portal only latest ISO will be available. If you need previous ISO files, you need to raise support request with sophos.
Hope this article helps you.