Selective filtering of multi-address answers

Kevin Darcy kcd at
Mon Jun 11 21:40:18 UTC 2012

On 6/11/2012 5:29 PM, Andris Kalnozols wrote:
> 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.
Nice to know there are at least 2 organizations putting the sortlist 
feature to good use...

                 - Kevin

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