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Last update: 2022-04-26

Software appliance

You can deploy the Sophos Firewall software appliance on custom hardware over Windows and macOS systems.


When you install the Sophos Firewall ISO on custom hardware, the installation process formats, reimages, and then repartitions the custom hardware with SFOS. The process erases the contents of the hard disk, including the operating system. So, make sure you take a backup of all data before the installation.


Hardware Specification
Network interface cards 2
RAM 4 GB minimum
HDD or SSD 10 GB minimum

64 GB recommended
USB pen drive 1 GB

If you don't meet the minimum requirements for new installations of SFOS 18.0, or if you're migrating from an earlier version, Sophos Firewall goes into fail-safe mode.


Configure the vCPU and vRAM based on the purchased license. Don't exceed the maximum number of vCPUs specified in the license.

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