nanog mailing list archives
Re: How do you stop outgoing spam?
From: Brad Knowles <brad.knowles () skynet be>
Date: Tue, 17 Sep 2002 20:35:03 +0200
At 11:07 AM -0700 2002/09/17, Scott Francis wrote:
Much more complex to implement and manage; doesn't scale well. The fewer decisions the anti-spam system has to make, the better it will work. If it only has to decide whether or not a specific IP/port combination has exceeded a certain threshold, it will run much more smoothly than if it's examining the contents of each packet.
Indeed, that will be a lot more scalable. But if you still have to look into each packet to see which ones are link encrypted (and therefore should be left alone) and which ones aren't (and therefore should be transparent proxied and/or traffic-shaped), that is quite a bit more work.
The question is how much abuse is too much? Is it okay to allow all open port 25 connections (traffic-shaped to low average bit-rates), or is any abuse too much?
-- Brad Knowles, <brad.knowles () skynet be> "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania. GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E W+++(--) N+ !w--- O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++) tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++)
Current thread:
- Re: How do you stop outgoing spam?, (continued)
- Re: How do you stop outgoing spam? Marshall Eubanks (Sep 10)
- Re: How do you stop outgoing spam? Scott Francis (Sep 17)
- RE: How do you stop outgoing spam? Al Rowland (Sep 10)
- RE: How do you stop outgoing spam? Christopher L. Morrow (Sep 10)
- RE: How do you stop outgoing spam? Dan Hollis (Sep 10)
- Re: How do you stop outgoing spam? Rafi Sadowsky (Sep 09)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 09)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 09)
- Re: How do you stop outgoing spam? Scott Francis (Sep 17)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 17)
- Re: How do you stop outgoing spam? Scott Francis (Sep 18)
- Re: How do you stop outgoing spam? Eliot Lear (Sep 09)
- Re: How do you stop outgoing spam? Rafi Sadowsky (Sep 09)
- Re: How do you stop outgoing spam? Eliot Lear (Sep 09)
- Re: How do you stop outgoing spam? Scott Francis (Sep 17)
- Re: How do you stop outgoing spam? John M. Brown (Sep 09)
- Re: How do you stop outgoing spam? alex (Sep 10)
- Re: How do you stop outgoing spam? Valdis . Kletnieks (Sep 10)
- Re: How do you stop outgoing spam? Iljitsch van Beijnum (Sep 10)