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North American Network Operators Group

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Re: Fw: Administrivia: ORBS

  • From: Paul Vixie
  • Date: Fri Jan 14 21:44:21 2000

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





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