If the iptables-ipv6 package is installed,
netfilter under Red Hat Enterprise Linux can filter the next-generation IPv6 Internet
protocol. The command used to manipulate the IPv6 netfilter is
ip6tables. Most directives for this command are
identical to those used for iptables, except the
nat table is not yet supported. This means that it is
not yet possible to perform IPv6 network address translation tasks, such
as masquerading and port forwarding.
Saved rules for ip6tables are stored in the
/etc/sysconfig/ip6tables file. Old rules saved by
the ip6tables initscripts are saved in the
/etc/sysconfig/ip6tables.save file.
The configuration file for ip6tables initscript is
/etc/sysconfig/ip6tables-config and the names for
each directive vary slightly. For instance, the
iptables-config directive
IPTABLES_MODULES is
IP6TABLES_MODULES in the
ip6tables-config file.
