[dns-operations] query dropping vs. returning nxdomain

[Edward Lewis]

At 20:14 -0800 3/6/06, Matt Ghali wrote:

>Would it generally be considered poor form to drop queries you do
>not want to answer? Perhaps not only queries that would return
>NXDOMAIN, but also queries that maybe administratively you do not
>wish to answer.

There's a difference between "I can't reach you" and "You told me 
no."  The former leaves the situation in a state of uncertainty. 
Uncertain is not a good state for a protocol to be in.

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Edward Lewis                                                +1-571-434-5468
NeuStar

Nothin' more exciting than going to the printer to watch the toner drain...