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How to disable IPv6 on a Linux device

Updated:

This guide will show you how to disable IPv6 on a Linux operating system.


Follow these steps:

  1. Open the Terminal using the Ctrl+Alt+T keyboard shortcut. On the Terminal window, enter the following command:

     
    sudo nano /etc/sysctl.conf

    This command will open the sysctl.conf file in the Terminal.
    ipv6LINUX1.png

  2. Scroll down to the bottom of the sysctl.conf file and paste these lines:

    net.ipv6.conf.all.disable_ipv6 = 1

    net.ipv6.conf.default.disable_ipv6 = 1

    net.ipv6.conf.lo.disable_ipv6 = 1

    net.ipv6.conf.tun0.disable_ipv6 = 1

    ipv6LINUX2.png

  3. Save the changes by pressing Ctrl+O and Ctrl+X after that.

  4. Enter sudo sysctl -p to apply the changes in the sysctl.conf file.
    ipv6LINUX3.png

  5. Check the status of IPv6 by entering the following command in the Terminal: 

    sudo cat /proc/sys/net/ipv6/conf/all/disable_ipv6

    If you see 1 as a reply, it means IPv6 is not running on your device anymore.
    ipv6LINUX4.png

 

 

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