install ip6tables on centos

yum info iptables\*

Name : iptables-ipv6

Arch : i386

Version : 1.3.5

Release : 5.3.el5_4.1

Size : 161 k

Repo : base

Summary : IPv6 support for iptables.

URL : http://www.netfilter.org/

License : GPL

Description: The iptables package contains IPv6 (the next version of the IP

: protocol) support for iptables. Iptables controls the Linux kernel

: network packet filtering code, allowing you to set up firewalls and

: IP masquerading.

:

: Install iptables-ipv6 if you need to set up firewalling for your

: network and you are using ipv6.

yum install iptables-ipv6 -y

reference: http://www.0x61.com/forum/centos-linux-f91/how-to-install-ip6tables-t1256762.html