Selective filtering of multi-address answers

Mark Andrews marka at
Mon Jun 11 21:54:35 UTC 2012

	 you should also be pushing for proper multi-homed server
support in those applications that are causing you problems (read
just about all IP applications).  This is relatively easy for TCP.


In message <4FD66331.1050501 at>, Andris Kalnozols writes:
> On 6/11/2012 1:23 PM, Kevin Darcy wrote:
> > **Configure sortlists to push those bad A records to the end of the
> > response. This may on the surface seem like a kludge, but remember, the
> > whole point of sortlists is to give preference to certain addresses over
> > others, and IMO, a working/reachable address is "preferred" over one
> > that isn't working or isn't reachable :-)
> >
> Excellent suggestion, Kevin!  I was fixated on the rocket surgery
> BIND features and didn't consider the simpler solution which our
> resolvers already implement.  Also, keeping things honest by
> preserving the overall integrity of the DNS data is also a plus
> in this case.
> Thanks,
> Andris
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Mark Andrews, ISC
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