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How to Disable IPv6 for Linux via Network Manager

This guide explains how to disable IPv6 on Linux using Network Manager. Disabling IPv6 may help prevent connectivity issues and IPv6 traffic leaks when using services that only support IPv4. This includes certain CyberGhost features, such as Smart DNS, which currently operates over IPv4 only. 

Important: The exact names of menus and options may vary depending on your Linux distribution and desktop environment. The steps in this guide were created using Ubuntu 26.04, so you may notice minor differences on other distributions or Ubuntu versions.

  1. In the top-right corner, open network settings and open the Wired options.

    The quick settings menu in Ubuntu, with the arrow button next to the "Wired" connection option highlighted in yellow box.

  2. Select Wired Settings.

    The expanded network quick settings menu in Ubuntu, with the "Wired Settings" option highlighted in a yellow box.

  3. Click the gear icon next to the connection you want to modify.

    The Ubuntu Network settings window, with the gear icon next to the "Wired" connection toggle highlighted in a yellow box.

  4. Open the IPv6 tab.

    disable-IPv6-for-Linux-via-Network-Manager-4.png

  5. Change the IPv6 Method setting to Disable and click Apply to confirm the changes.

    The IPv6 settings panel within the Ubuntu, with both the "Disable" radio button and the "Apply" button in the top-right corner highlighted in yellow boxes.

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