Disable IPv6 in CentOS

After CentOS 6 is installed by default, IPv6 is automatically enabled, but IPv6 is not widely used yet. We recommend that you disable the IPv6 module. The following describes how to disable the function.

Note: Blue = command name

Light Green = Command Parameters

Light blue = Option

Purple = directory

System Environment: CentOS 6.2 i686

1. Check whether ipv6 is enabled in the system.

A) view the ENI attributes

Command: ifconfig

Note: "inet6 addr:..." is available :....... The ipv6 feature is enabled.

B) view the information loaded by the kernel module

Command: lsmod | grep ipv6

2. Disable ipv6

Add at the end of/etc/modprobe. d/dist. conf

Alias net-pf-10 off
Alias ipv6 off
You can use the vi editor or the following command:
Cat <EOF>/etc/modprobe. d/dist. conf
Alias net-pf-10 off
Alias ipv6 off
EOF

Restart the computer after writing and modifying the data.

Ipv6 enable method click http://www.centoscn.com