How can I disable IPv6 in CentOS 7

Answered 3 years ago (Apr 01, 2021) by Eldernode Staff

Open the following file for editing:

nano /etc/default/grub

Then add the following parameter for GRUB_CMDLINE_LINUX:

ipv6.disable=1

Like the following example:

GRUB_CMDLINE_LINUX="ipv6.disable=1 crashkernel=auto"

In the next step, run the following command:

grub2-mkconfig -o /boot/grub2/grub.cfg

Finally, run the following command to restart the server:

shutdown -r now