[26748] in North American Network Operators' Group
Re: Fw: Administrivia: ORBS
daemon@ATHENA.MIT.EDU (Paul Vixie)
Fri Jan 14 21:43:39 2000
To: nanog@merit.edu
From: Paul Vixie <vixie@mibh.net>
Date: 14 Jan 2000 18:41:48 -0800
In-Reply-To: patrick@ianai.net's message of "13 Jan 2000 16:35:23 -0800"
Message-ID: <g3901scaz7.fsf@redpaul.mibh.net>
Errors-To: owner-nanog-outgoing@merit.edu
patrick@ianai.net (I Am Not An Isp) writes:
> What do other open relay lists (e.g. MAPS/RSS) do when they are filtered at
> the network level?
That's a misleading question. MAPS RSS doesn't probe for relay openness
unless spam has been received from the relay in question. OTOH, if there
is spam receipt and if the relay doesn't appear to be reachable, a human
operator can decide that a firewall might be involved and block the relay
in spite of our inability to test it.
MAPS RSS never blocks whole address ranges, only /32's.
ORBS is apparently blocking whole /16's belonging to Abovenet only because
Abovenet refuses to have whole /16's probed for SMTP servers and then having
each such server probed for relay openness. (I can't say as I blame them.)
--
Paul Vixie <vixie@mibh.net>
>> But what *IS* the internet?
> It's the largest equivalence class in the reflexive transitive
> symmetric closure of the relationship "can be reached by an IP
> packet from". --Seth Breidbart
