On Thu, 30 Dec 2010, David F. Skoll wrote:
On 30 Dec 2010 17:13:07 -0000
John Levine <jo...@taugh.com> wrote:
We'll have to change our software to handle v6 lookups no matter what,
so I don't see it as a big deal whether it's a small change or a
slightly larger change.
I agree, so I propose a much larger change: Stop using DNS for this
purpose. I don't think it's the right tool for the job.
Any protocol that makes lookups in a huge adress space efficient and
efficiently-cacheable is going to leak much of the list information.
So why not just distribute copies of the entire list in a format that
permits efficient lookups and efficient sychronization (eg with
rsync)?
Timeliness? How often are you going to refresh the local copy of the
entire WL/BL? Or are you assuming the WL/BL will be relatively unchanging
over time?
Overall bandwidth? How big is the overall WL/BL? Can hosting of the file
be as efficiently distributed across multiple caching hosts (e.g. via
Coral) as can DNS? What's the download volume vs. the DNS query volume? Or
are you assuming the refresh protocol supports incremental updates? Does
rsync support any incremental update mechanism other than appending? That
would work for added entries, how do you delete?
Local spam volume vs. the size of the full BL? If I only get a hundred
spams a day is it reasonable for me to store the full BL locally? Perhaps
several BLs?
Are you, essentially, proposing the replacement of DNS with /etc/hosts?
Granted, rsync or something similar may be a better solution than DNS in
some cases, but I think it's unwise to completely discard it.
--
John Hardin KA7OHZ http://www.impsec.org/~jhardin/
jhar...@impsec.org FALaholic #11174 pgpk -a jhar...@impsec.org
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