Hi. Remember the ASRG? I was hoping it might do a little research.
In talking to people about IPv6 mail, I'm still coming to the conclusion
that anyone who thinks they know how they're going to handle it, beyond
the current toy scale, doesn't understand the problem. Things we might
address include:
* Will DNSBLs that work like v4 BLs, with a query per IP, blow out DNS
caches? If so, can this be solved by hacks like partitioned caches that
treat BL traffic separately? Would something like my B-tree hack work
better?
* Is there some reasonable way for networks to publish allocation
granularity, e.g., this range is a /64 per user, that range is individual
hosts? If they can, how useful would it be to running BLs or otherwise
making filtering decisions?
* Is there a practical way to do hard or soft whitelisting of V6 mail
hosts? (Hard: no body filtering, soft: with body filtering)
* Should large and small systems use the same filtering techniques? Large
systems have larger mail volume and so can build better models of incoming
traffic, small systems can afford cruder filters like no mail from Korea
* Can we build models to predict this stuff now, since under the most
optimistic scenario it'll still be years before the v6 mail volume
approaches v4 mail volume.
R's,
John
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