Disable IPv6 Features

1.Disable IPv6 Networking Support

/etc/sysconfig/network
Change:
NETWORKING_IPV6=yes
To:
NETWORKING_IPV6=no


2.Disable IPv6 Protocol Stack for Kernel

/etc/modprobe.conf
Add the following 2 lines: (A reboot will be required)

alias net-pf-10 off
alias ipv6 off

原文資料參考
http://www.mjmwired.net/resources/mjm-fedora-fc6.html#ipv6