nanog mailing list archives
Re: misunderstanding scale
From: Barry Shein <bzs () world std com>
Date: Thu, 27 Mar 2014 13:47:49 -0400
On March 26, 2014 at 22:17 owen () delong com (Owen DeLong) wrote:
Then the spammers will grab /48s instead of /64s. Lather, rinse, repeat.
Hang on, do spammers "grab" address blocks? Ok, I'm sure it happens, this is not an existence proof. But is that really a significant characterization of their behavior? That they go to an RIR or ISP and get an address block allocation? I mean post-Ralsky (almost obscure historical spam reference.) It seems like ALL the spam I see is purloined resources: botnets, unauthorized use of (usually misconfigured) mail servers, web software holes, free sites in general (such as google groups but also those "community" free sites), etc. I suppose this is the place where someone just says: "Yes, Barry, it is" and considers the matter settled but it sure doesn't match my experience. We block a lot of /24s (like about 150,000 right now) and even a few larger chunks but not because they're owned by spammers but because they're repeatedly ABUSED by spammers. But unfortunately they're just about always owned by people/companies who believe they're legitimate but just can't seem to keep the spammers from abusing them over and over. And the chance of ham from them is so slight that one just blocks them wholesale. Well, maybe for the purpose of this discussion it's the same thing, how do you block blocks which are being abused or you want to block for whatever reason. -- -Barry Shein The World | bzs () TheWorld com | http://www.TheWorld.com Purveyors to the Trade | Voice: 800-THE-WRLD | Dial-Up: US, PR, Canada Software Tool & Die | Public Access Internet | SINCE 1989 *oo*
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 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)
- Re: misunderstanding scale, SMTP edition Tony Finch (Mar 26)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Saku Ytti (Mar 23)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Mark Tinka (Mar 23)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Mark Andrews (Mar 23)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Mark Tinka (Mar 23)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Nick Hilliard (Mar 23)
- Re: misunderstanding scale (was: Ipv4 end, its fake.) Mark Andrews (Mar 23)