On Fri, 12 Mar 2004, Hoerdt Mickael wrote: > Allowing or not allowing a reply to a icmpv6 multicast request message is > an interesting question. > > Now I am wondering why it is not allowed to answer to such a message in > IPv4 (=> http://www.icir.org/fenner/mcast/icmp.html) and allowed in IPv6 ?
Uhh -- it's fine to answer an ICMP echo request, but you should not send ICMP errors bassed on v4 packets. The same general principle applies to v6 as well -- with the exception that options formed in a certain way still require a reply. This could be an attack vector in the future, if multicast were to be used in the large scale. > On Fri, 12 Mar 2004, Stig Venaas wrote: > > > On Thu, Mar 11, 2004 at 11:53:05PM -0500, Suresh Krishnan wrote: > > > On Thu, 11 Mar 2004 [EMAIL PROTECTED] wrote: > > > > > > >Now, who can tell if multicast echo request is the primary > > > >multicast debugging mechanism or not ?? > > > > > > Since there is no alternate mechanism, this has become the primary and > > > preferred multicast debugging mechanism. If some mechanism is proposed > > > which is better and is less liable to be misused, it will become the > > > primary mechanism. The KAME project was working on a multicast traceroute > > > tool for IPv6 a while ago. I have not personally used it. Probably > > > Jinmei can comment further on this. > > > > > > Especially pinging ff02::1 is often used not just for debugging > > multicast, but also for other debugging. So I think this is useful, > > even if some other multicast debugging mechanisms are introduced. > > > > Stig > > > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > [EMAIL PROTECTED] > > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > > -------------------------------------------------------------------- > > > -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
