GIT – Our policy and network configuration does not requires IPv6 support in RHEL / / Fedora Linux. How do I prevent the kernel module from loading at boot time and IPv6 networking?

You can easily prevent the kernel module from loading by updating the following two files:

  1. /etc/modprobe.conf – Kernel driver configuration file.
  2. /etc/sysconfig/network – RHEL / CentOS networking configuration file.

/etc/modprobe.conf

Edit /etc/modprobe.conf, enter:
# vi /etc/modprobe.conf
Append the following line:

install ipv6 /bin/true

Save and close the file.

/etc/sysconfig/network

Edit /etc/sysconfig/network, enter:
# vi /etc/sysconfig/network
Update / add as follows:

NETWORKING_IPV6=no
IPV6INIT=no

Save and close the file. Restart networking service
# service network restart
# rmmod ipv6

Alternatively, simple reboot the box:
# reboot
Verify IPv6 is disabled, enter:
# lsmod | grep ipv6
# /sbin/ifconfig

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