[68770] in North American Network Operators' Group
Re: DNS requests for 1918 space
daemon@ATHENA.MIT.EDU (Duane Wessels)
Tue Mar 16 13:31:45 2004
Date: Tue, 16 Mar 2004 11:30:19 -0700 (MST)
From: Duane Wessels <cee4@packet-pushers.com>
To: nanog@nanog.org
In-Reply-To: <40574244.40906@globalstar.com>
Errors-To: owner-nanog-outgoing@merit.edu
> The IN-ADDR.ARPA delegations for RFC1918 space are just like any
> other block. You'll just end up hitting IANA's blackhole servers,
> and not all that much, the cache times are one week.
In theory, yes.
In reality there are quite a few resolvers that, apparently, do not
receive the delegation response and continue to hit the roots with
PTR queries for RFC1918 space.
Recent measurements at a single instance of an anycasted root server
show that at least 250 such resolvers generate between 60-120 RFC1918
PTR queries/sec.
Duane W.
