On Wednesday 2011-04-27 12:43, Ulrich Weber wrote: >Each fragmented IPv6 packets will traverse netfilter separately, >in contrast to IPv4, where its only one refragmented packet. Not really. All fragments enter nf_hook_slow, be it IPv4 or IPv6. It's just that nf_defrag - which is a netfilter module - collects and suppresses fragments before spitting out the unfragmented one. >"ip6tables -A INPUT -j ACCEPT -p udp --dport 53" will only match the >first fragment, where the UDP header can be found. To match the >additional fragments, you have to insert these rules: > >ip6tables -I INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT >ip6tables -I OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT That will load nf_conntrack_ipv6, and because conntrack depends on nf_defrag_ipv6, will load that too. Once it is loaded, packets should be defragmented independetly of whether you actually use -m conntrack (or the obsolete -m state) or not. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
