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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Stealth Blocking
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/
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