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How To Disable IPv6 on CentOS 6 / RHEL 6

This post guides you on how to disable IPv6 on CentOS 6 / RHEL 6. Edit the /etc/sysctl.conf file. vi /etc/sysctl.conf Put the following entry to disable IPv6. net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 Execute the following command to reflect the changes. sysctl -p That’s All.