[SHAME] Spam Rats
bonomi at mail.r-bonomi.com
Fri Jan 11 03:26:54 UTC 2013
> Date: 10 Jan 2013 20:57:25 -0000
> From: "John Levine" <johnl at iecc.com>
> Subject: Re: [SHAME] Spam Rats
> >*.18.104.22.168.5.a.0.0.8.b.d.0.1.0.0.2.ip6.arpa. PTR a.node.on.vlan344.namn.se.
> >...will work just fine, for instance.
> Since there is no AAAA record for a.node.on.vlan344.namn.se., this
> won't work fine in any rDNS check I'm aware of.
it works just fine, as long as there is one AAAA for that name (even in a
different netblock), and -that- adderess has rDNS matching the AAAA
> You are aware that useful rDNS has to have matching forward DNs, right?
"Not exactly." <grin>
The 'usual' test is 'rev->fwd-rev' and compare the results of the two 'rev'
look-ups. This allows a host with multiple interfaces to have -one- name
for all interfaces.
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