How to disable IPv6 on Linux?

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

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.

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

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

3. Enter sudo sysctl -p to apply the changes in the sysctl.conf file.

4. 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.

Note: In case you have any questions or are experiencing any issues, please feel free to contact our 24/7 customer support team.