On 1/25/12 12:11 PM, SM wrote:
At 11:23 25-01-2012, Dave Warren wrote:
I have to wonder, if a DNSBL were being operated entirely on a free
basis (rather than a freemium model), might it not be better to take
advantage of the large caches out there rather than having thousands
of individual servers performing the same mundane set of lookups
individually?
There are no large caches out there. That's not how DNS works in my
opinion.
Dear SM,
Many providers offer non-authoritative DNS servers. SOPA and PIPA bills
attempt to regulate which domains are to be excluded, and ignore
authoritative DNS traffic not cached by providers. Of course, only
accepting results from authoritative servers would reduce performance.
Infrequently requested records might be dropped prior to expiry to
liberate cache.
Obviously this negates the DNSBL's ability to try and pull cash out
of the larger entities, but purely from a resource management point
of view, if someone wants to offer a front-line cache for free,
surely that should reduce load.
It is expensive to provide such a cache for free. Why would someone
want to offer such a service for free?
Use of these caching services generate valuable information and reduce
network traffic between peers.
Regards,
Doug Otis
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