nanog mailing list archives

Re: IPv6 filtering


From: Seth Mattinen <sethm () rollernet us>
Date: Tue, 25 Jan 2011 21:20:20 -0800

On 1/25/11 9:13 PM, Roland Dobbins wrote:

On Jan 26, 2011, at 12:03 PM, Franck Martin wrote:

Ok filtering ipv6 and ipv6-icmp is understood, it is like ipv4. 

Be advised, ICMPv6 is *not* like ICMP in IPv4, and knowing what can be filtered, what to filter, and where to filter 
it is considerably more complex than in IPv4 - which, given the prevalence of broken PMTU-D alone, is apparently not 
well-understood in many quarters, heh.



Also, try to resist popular opinion in outright blocking of ICMP - it's
not really that evil.

~Seth


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