nanog mailing list archives
Re: misunderstanding scale
From: Owen DeLong <owen () delong com>
Date: Tue, 25 Mar 2014 22:31:25 -0700
IPv6 adds an entirely new aspect to it.Well, if you mean the entirely new aspect is a list of hex addresses instead of dotted decimal addresses I guess so. I personally would rather have a list of actual end system addresses than a list of addresses that represent a mail server and several thousand other innocent devices behind a NAT. Might be easier to tell the system owner which system is compromised than to call a large company and tell them one of their systems is compromised. It would also be nice to be able to allow legitimate email to a business partner while blocking his compromised system only.
I thin the new dimension is that a spammer today who manages to snag a /8 has 16.7 million addresses to play with. Even if he forces you to add each and every one to your list, that’s a few megabytes for a VERY large IPv4 block. OTOH, a spammer with a single /64, pretty much the absolute minimum IPv6 block, has more than 18 quintillion addresses and there’s not a computer on the planet with enough memory (or probably not even enough disk space) to store that block list. Sometimes scale is everything. host-based reputation lists scale easily to 3.2 billion host addresses. IPv6, not so easily. Owen
Current thread:
- Re: why IPv6 isn't ready for prime time, SMTP edition, (continued)
- Re: why IPv6 isn't ready for prime time, SMTP edition joel jaeggli (Mar 30)
- Re: why IPv6 isn't ready for prime time, SMTP edition Robert Drake (Mar 30)
- Re: why IPv6 isn't ready for prime time, SMTP edition Owen DeLong (Mar 29)
- Re: why IPv6 isn't ready for prime time, SMTP edition Barry Shein (Mar 30)
- Re: why IPv6 isn't ready for prime time, SMTP edition Jimmy Hess (Mar 29)
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- Re: why IPv6 isn't ready for prime time, SMTP edition Larry Sheldon (Mar 29)
- Re: why IPv6 isn't ready for prime time, SMTP edition Barry Shein (Mar 29)
- Re: why IPv6 isn't ready for prime time, SMTP edition John Levine (Mar 29)
- Re: why IPv6 isn't ready for prime time, SMTP edition hammani . b (Mar 30)
- RE: misunderstanding scale Naslund, Steve (Mar 25)
- Re: misunderstanding scale Owen DeLong (Mar 25)
- Re: misunderstanding scale Matthias Leisi (Mar 26)
- Re: misunderstanding scale John Levine (Mar 26)
- RE: misunderstanding scale Naslund, Steve (Mar 26)
- Re: misunderstanding scale Owen DeLong (Mar 26)
- Re: misunderstanding scale Matthias Leisi (Mar 27)
- Re: misunderstanding scale Chip Marshall (Mar 27)
- Re: misunderstanding scale Barry Shein (Mar 27)
- Re: misunderstanding scale, SMTP edition John Levine (Mar 26)
- Re: misunderstanding scale, SMTP edition Jack Bates (Mar 26)
- Re: misunderstanding scale, SMTP edition Lamar Owen (Mar 26)