> Date: 10 Jan 2013 20:57:25 -0000 > From: "John Levine" <jo...@iecc.com> > Subject: Re: [SHAME] Spam Rats > > >*.4.4.3.0.5.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.
