Disable ipv6 Centos 6

To disable ipv6 in Centos 6 / 6.2 / 6.5 follow the below tutorial :

Proper way of disabling IPv6 subsytem in RedHat Linux 6 / CentOS 6 (dont unload modules or so)

in /etc/sysctl.conf  :  net.ipv6.conf.all.disable_ipv6 = 1

in /etc/sysconfig/network  : NETWORKING_IPV6=no

in /etc/sysconfig/network-scripts/ifcfg-eth0 : IPV6INIT=”no”

disable iptables6 – chkconfig –level 345 ip6tables off

reboot

or use the below method :

echo “net.ipv6.conf.default.disable_ipv6=1″ >> /etc/sysctl.conf

echo “net.ipv6.conf.all.disable_ipv6 = 1″ >> /etc/sysctl.conf

echo “net.ipv6.conf.all.disable_ipv6=1” >> /etc/sysctl.conf ; cat /etc/sysctl.conf ; reboot.

sysctl -p