Re: [PATCH 0/2] IPv6 conntrack support for neighbour discovery

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From: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>
Date: Fri, 23 Jan 2009 10:50:59 +0100 (CET)

> On Fri, 23 Jan 2009, Jozsef Kadlecsik wrote:
> 
> > On Fri, 23 Jan 2009, Eric Leblond wrote:
> > 
> > > > How about just using NOTRACK target ?
> > > 
> > > This is a possible solution but you will then have to be a Netfilter
> > > Jedi to build a correct IPv6 filtering ruleset. I think even Padawan
> > > have no clue about the existence of the NOTRACK target.
> > > 
> > > Seriously speaking, the NOTRACK target is tagged "NETFILTER_ADVANCED"
> > > and IPv6 is becoming more and more frequent. I don't think we should use
> > > such a complicated solution for simply obtaining an IPv6 address. We
> > > will loose quit a bunch of users on this.
> > 
> > RFC4890, Recommendations for Filtering ICMPv6 Messages in Firewalls, deals 
> > with ICMPv6 filtering on firewalls in details and even contains a sample 
> > ip6tables script.
> > 
> > Wouldn't it make sense to add simply the RFC to the iptables source tree, 
> > and a sentence to the ip6tables manpage saying:
> > 
> > "Please read RFC 4890 and the sample script in it on how to filter ICMPv6
> > properly in an IPv6 environment."
> 
> Looking through the sample script again, it is incomplete as it does not 
> handle the ICMPv6 traffic targeted to/sent from the firewall itself. But 
> it'd be not hard to add the missing rules.

I looks not to show the recommended rules but just the usage of ip6tables.

-- Yasuyuki Kozakai
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