nanog mailing list archives
Re: SMTP Port Blocking: Success or Failure?
From: John Levine <johnl () iecc com>
Date: 27 Feb 2005 16:19:52 -0000
What about rate limiting SMTP traffic rather than blocking it? That could allow legitimate use for most private customers, while preventing bulk traffic.
Comcast has been doing something like that, looking for spikes of SMTP connects and blocking when they see them, done at the IP level. I can't say that I'm overly impressed with how well it's working, but it's better than nothing. Regards, John Levine, johnl () iecc com, Primary Perpetrator of "The Internet for Dummies", Information Superhighwayman wanna-be, http://www.johnlevine.com, Mayor "I dropped the toothpaste", said Tom, crestfallenly.
Current thread:
- SMTP Port Blocking: Success or Failure? Claydon, Tom (Feb 26)
- Re: SMTP Port Blocking: Success or Failure? Christopher L. Morrow (Feb 26)
- Re: SMTP Port Blocking: Success or Failure? Ketil Froyn (Feb 27)
- Re: SMTP Port Blocking: Success or Failure? John Levine (Feb 27)
- Re: SMTP Port Blocking: Success or Failure? Stephen Fulton (Feb 28)