nanog mailing list archives
Re: Stealth Blocking
From: "Eric A. Hall" <ehall () ehsco com>
Date: Thu, 24 May 2001 10:23:23 -0700
Dave Rand wrote:
I'm not sure how effective rate limiting will be. Many spammers send one copy of the spam to an open relay, but use many (2 to 50) recipients.
Rate-shapers would also work on the relays. The idea is that if ISPs would implement a default rate-limit (let's say 4kb/s) that it wouldn't interfere with normal use. It would interfere with spam distribution because it would slow down the big runs dramatically. The negative side effect is that it cripples people who use email as a file transfer protocol.
One other way to do this might be to do port 25 blocking on new customers, but allow customers to get unblocked on request after they have been around a while...
That would be nice as well and is something I've advocated. ISPs seem unwilling to do this, and it would seem that implementing a default low-bandwidth rate limit would mean less maintenance. -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
Current thread:
- Re: Stealth Blocking, (continued)
- Re: Stealth Blocking Mitch Halmu (May 24)
- Re: Stealth Blocking Matt Cramer (May 24)
- Re: Stealth Blocking Mitch Halmu (May 24)
- Re: Stealth Blocking Dan Hollis (May 24)
- Re: Stealth Blocking Shawn McMahon (May 24)
- Re: Stealth Blocking Jason Slagle (May 24)
- Re: Stealth Blocking Daniel Senie (May 25)
- Re: Stealth Blocking Jeremy T. Bouse (May 24)
- Re: Stealth Blocking Dan Hollis (May 24)
- Re: Stealth Blocking Eric A. Hall (May 24)
- Re: Stealth Blocking Scott Francis (May 24)
- Re: Stealth Blocking Eric A. Hall (May 24)
- Re: Why are you all still here? (Was Re: Stealth Blocking) Adam Rothschild (May 24)
- Re: Stealth Blocking Eric A. Hall (May 24)
- Re: Stealth Blocking Mitch Halmu (May 24)
- Re: Stealth Blocking J.D. Falk (May 25)