If there is anyone out there interested in doing research into DNS
recursive resolvers and are seeking either (1) access to data (stripped of
PII of course) and/or (2) modest funding support, please let me know
off-list.

- Jason



On 2/20/12 2:27 PM, "Emiliano Casalicchio"
<[email protected]> wrote:

>John,
>may be the model described in this paper can be useful for you.
>
>       Yakup KoƧ, Almerima Jamakovic, Bart Gijsen, "A Global Reference Model of
>the DNS"
>
>presented at DNS-EASY 2011.
>
>Here the proceedings:
>http://www.gcsec.org/sites/default/files/files/dnseasy2011_final.pdf
>
>Best
>Emiliano
>
>
>
>
>On 18 Feb 2012, at 02:57, John Levine wrote:
>
>> Are there any models of DNS cache behavior, either analytic or
>> simulations?  What I have in mind is something that would help me see
>> whether I should partition a cache among various kinds of traffic, or
>> perhaps limit max TTLs, or experiment with replacement strategies.
>> 
>> For that matter, what's the state of DNS modelling in general?
>> 
>> I found a paper by Jung et al from 2003 on cache models which starts
>> by asserting that caches are so big that entries only drop out due to
>> TTL expiry, did a lot of analysis and simulation, and concluded that
>> 15 minute TTLs got nearly the same cache benefit of 24 hr TTL.
>> 
>> A 2010 paper by Alexiou et al.  models the Kaminsky DNS poisoning
>> attack and the port randomizing fix, which is interesting but not what
>> I'm looking for.  (They conclude that the attack is real, and the fix
>> works OK.)
>> 
>> Anything else I should be looking at?
>> 
>> 
>> -- 
>> Regards,
>> John Levine, [email protected], Primary Perpetrator of "The Internet for
>>Dummies",
>> Please consider the environment before reading this e-mail. http://jl.ly
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>> 
>
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