Re: IETF IPv6 platform configuration

[Elwyn Davies <elwynd at dial.pipex.com>]

Kevin Loch wrote:
> Sam Hartman wrote:
> > > > > > > "secIETF" == IETF Secretariat <ietf-secretariat at ietf.org> writes:
> >     secIETF> *    Only HTTP, SMTP, FTP, and DNS traffic are permitted 
> > through an IPv6     secIETF>         Native firewall (pings, 
> > traceroutes etc. are dropped) 
> >
> > Please make sure that ICMP messages needed for path MTU discovery are
> > not filtered.
>
> Is there a compelling reason to filter ICMP at all?
>
> - Kevin
This is not a trivial problem.  There is a draft in progress which 
recommends what the v6ops wg believes ought to happen.
See 
http://www.ietf.org/internet-drafts/draft-ietf-v6ops-icmpv6-filtering-recs-00.txt
This does include making sure Packet Too Big errors are not dropped so 
that PMTU works,

This is just about to very slightly updated but it is essentially finished.

It would be good if we ate our own dogfood in this case (and we can also 
test whether the draft has the answers right!)

Regards,
Elwyn


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