[SHAME] Spam Rats

Mark Andrews marka at isc.org
Thu Jan 10 06:22:31 UTC 2013


In message <alpine.BSF.2.00.1301100106560.55043 at joyce.lan>, "John R. Levine" wr
ites:
> >> One is a stunt rDNS server that synthesizes the records on demand.
> >> (Bonus points for doing DNSSEC, too. Double bonus points for doing
> >> NSEC3.)
> >
> > NSEC3 is a waste of time in ip6.arpa or any similarly structured
> > zone so -1000000 for doing NEC3 and effectively doing a DoS attack
> > against yourself and the client resolvers.
> 
> I know, but figuring out on the fly what order the hashes are would 
> be quite a coding feat.

subtract labels until you have one which fits the namespace pattern.
that is the closest encloser <ce>. hash that name for the closest
encloser.  hash <label>.<ce> add/subtact one for the second half
of the noqname proof.  hash *.<ce> add/subtact one for the no
wildcard proof.

> R's,
> John
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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