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OS version

Feature availability

The OS Version device posture attribute checks whether the version of a device’s operating system matches, is greater than or lesser than the configured value. The version must be specified as a valid Semver (for example, 1.2.0).

​​ Enable the OS version check

  1. In the Zero Trust Dashboard, go to Settings > WARP Client.
  2. Scroll down to WARP client checks and select Add new.
  3. Select OS version.
  4. Configure the Operating system, Operator, and Value fields to specify the OS version you want devices to match.
  1. Select Save.

Next, verify that the OS version check is returning the expected results.

​​ Determine the OS version

Operating systems display version numbers in different ways. This section covers how to retrieve the version number in each OS, in a format matching what the OS version posture check expects.

​​ On macOS

  1. Open a terminal window.

  2. Use the defaults command to check for the value of SystemVersionStampAsString.

    defaults read loginwindow SystemVersionStampAsString

​​ On Windows

  1. Open a Powershell window.

  2. Use the Get-CimInstance command to get the version property of the Win32_OperatingSystem class.

    (Get-CimInstance Win32_OperatingSystem).version

​​ On Linux

Linux currently relies on the system Kernel version instead of a specific distro version. For the OS version check to work, the kernel version must be converted to a valid SemVer.

  1. Open a Terminal window.

  2. Run the uname -r command to get the complete version.

    uname -r

  3. The valid SemVer would be the first 3 whole numbers of the output you obtain in the previous step. For instance, if the command above returned 5.14.0-25.el9.x86_64, the valid SemVer would be 5.14.0.

​​ On ChromeOS

On Chromebooks, the WARP client runs as an Android application inside an Android VM. For the OS version check, WARP version 6.16 and below reports the Android VM version and not the ChromeOS version. Version 6.17 and above returns the actual ChromeOS version.

To determine the ChromeOS version on your device, select the time and go to Settings > About ChromeOS.