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From Matus UHLAR - fantomas <>
Subject Re: TTL and DNSBLs [per-IP negative-cache TTL]
Date Thu, 07 Jul 2011 14:12:31 GMT
>"David F. Skoll" <> wrote:
>> On Thu, 7 Jul 2011 11:50:44 +0200
>> Matus UHLAR - fantomas <> wrote:
>>> Negative caching can be effective or in this case even
>>> ineffective too, can't it?
>> The point is that by definition, you can't have a per-IP
>> negative-cache TTL.

On 07.07.11 15:31, Andrzej Adam Filip wrote:
>But it is possible to use a wildcard DNS record for "not listed",
>is not it? :-)

it can, but it would have no positive effect due to way how wildcards 
in DNS work.

>The question is: Would it be cost effective?

there would be a cost of returning positive answer instead of negative.

Matus UHLAR - fantomas, ;
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Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
    One OS to rule them all, One OS to find them, 
One OS to bring them all and into darkness bind them 

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