How to Install Sophos UTM 9.6 on the Vault

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Sophos UTM Home Edition is a free version of the Sophos Universal Threat Management (UTM) software.  The home page is at  Sophos UTM Home Edition was successfully installed to the FW4A and FW6 series of the vault. To install it on the Vault, there is a relatively straight forward process that is very similar to installing any operating system onto any computer.

  1. Obtain the installation image
  2. Download software to transfer the installation image to a USB drive
  3. Install the new image

Verify Hardware Requirements

  • CPU : Intel compatible CPU @1.5Ghz
  • Memory : 1GB
  • Harddisk : 20GB
  • 2 PCI Ethernet Network Cards

Install Sophos UTM

Obtain the Installation Image

The installation image can be downloaded at

sophos overview
Sophos Download Page
  • Fill out the forms at the prompts
  • Verify that an email is received with the download information
  • Click on the link in the download email
  • Download the “software appliance” image. This example uses version 9.605-1.1
  • Accept the EULA
  • Fill out forms when prompted

Your download should begin immediately and when it is completed you should have an iso image with a name such as “asg-9.605-1.1.iso” downloaded that is ~1GB in size. You will also receive an attachment in the email with a license txt file. This will be needed when configuring the system via the web admin.

Transfer the installation image to a USB drive

The easiest way to transfer the installation image to a USB drive is by using software called “Rufus” on Windows or “balenaEtcher” on Apple OSX. See this link for  detailed instructions on how to create a bootable USB drive using Rufus or balenaEtcher. The Sophos USB drive for this example was created using Rufus. For Sophos, select a “dd” image, rather than an “ISO” image in Rufus.

Important Note:

The Sophos USB drive for this installation was a USB 3.0 drive. On the FW4A, the USB 3.0 drive must be inserted into the USB 3.0 port on the Vault, otherwise the installation will hang at about 16% with the message “Detecting storage devices”.

Install the Operating System on the Vault

Once the installation image is properly copied to the USB drive, it is ready to be installed on the Vault. There is a good manual including detailed installation instructions for Sophos UTM at Follow the instructions in the guide to install the software, then log in to the web admin page in order to configure the system. There are a few caveats to note during the installation.

When booting from a USB drive, you will get the error message “Install.tar wasn’t found on the installation media”. This occurs when booting from a USB drive, not a CD-ROM. To fix this:

  • Start the installation
  • At the Start prompt, enter console mode <Alt-F2>
  • At the bash prompt, type “mount /dev/sdb1   /install”
  • Exit the bash shell <Alt-F1>
  • Continue the installation <Start>

More details including screenshots of this fix can be found at

  • Verify the installation continues and follow the prompts
  • When prompted for “64 bit” – Select “Yes”
  • When prompted for “Install all capabilities” – Select “Yes”
  • Verify the system reboots and you can browse to the web admin page at (our example) or the Sophos default of

For this example, we configured the LAN port on the Vault (eth1) as the internal port and set the IP address to

Note: After the installation completed, we connected a PC directly to the LAN port with a static address of in order to browse to the web admin page and do the initial configuration.

Follow the prompts for the initial configuration.

At this point Sophos UTM is installed and can be further configured via the Web User Interface. A screenshot of the Sophos UTM dashboard is shown below.

sophos dashboard
Sophos Web Admin Dashboard

At this point, Sophos should be up and running on The Vault. If you experience any issues, please feel free to reach out:

System Compatibility

The table below shows the latest tested release of Sophos on each of the Vaults.

VaultUTM 9.506-2XG-18

If you have any questions, feel free to reach out to us at, or find more information in our Knowledge Base.

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