QUESTIONS CENTRE › Category: apache › How to disable ipv6 in Centos 5.x , RHEL & Fedora.
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ZENHOST Support Staff asked 11 years ago

By default the ipv6 module is turned on during the installation, you can turn off the module or install/configure the ip6tables tables to prevent your server from attacks.

Steps to disable the ipv6 module.

Edit the file /etc/modprobe.conf in your favorite editor and add the lines below.

alias net-pf-10 off
alias ipv6 off

Edit the /etc/sysconfig/network file

Change to

NETWORKING_IPV6=no

Disable the ipv6 firewall by :
service ip6tables stop
 
chkconfig ip6tables off
Restart your server and make sure that inet6 addr: is not listing any ipv6 ips in the ifconfig after reboot.