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You can deploy the Sophos Firewall virtual appliance in a VMware ESX or VMware ESXi environment.


  • Install VMware ESX or VMware ESXi 5.0 or later on a server that meets the minimum hardware requirements below.
  • Install vSphere Client (VMware management software) on a management device that has network access to the server.

For instructions, go to the vSphere installation and setup guide.

Hardware Specification
vCPU 1
vRAM 4 GB minimum
vNIC 2
Primary disk 16 GB minimum
Report disk 80 GB minimum

If you don't meet the minimum requirements, 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.