Selective filtering of multi-address answers

Andris Kalnozols andris at
Mon Jun 11 21:29:21 UTC 2012

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.


More information about the bind-users mailing list