nanog mailing list archives
Re: How do you stop outgoing spam?
From: Brad Knowles <brad.knowles () skynet be>
Date: Tue, 17 Sep 2002 20:22:50 +0200
At 1:51 PM -0400 2002/09/17, Greg A. Woods wrote:
No, Dave's second sentence is not true, thus his conclusion is bogus.
Dave was talking about "normal" TCP connections, and I was following the same model.
If you're talking about hi-jacking the TCP connection, then you are correct.
If you're talking about commercially available product, perhaps.... However this kind of thing is trivial with basic IPsec gateways and simple filtering ala IP Filter, etc.
How many ISPs use IPsec gateways and simple filtering with tools like IP filter? How scalable is this sort of thing? Could AOL do it with dozens or hundreds of OC-48 and OC-96 links? How long would it take to fix all the ISPs in the world that might potentially do transparent proxying of port 25? And where is the intelligence to selectively forward only those connections that are themselves encrypted and authenticated?
-- 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? Brad Knowles (Sep 11)
- Re: How do you stop outgoing spam? David Charlap (Sep 11)
- Re: How do you stop outgoing spam? Stephen J. Wilcox (Sep 11)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 11)
- Re: How do you stop outgoing spam? Joel Baker (Sep 11)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 11)
- Re: How do you stop outgoing spam? Christopher X. Candreva (Sep 11)
- Re: How do you stop outgoing spam? Barry Shein (Sep 11)
- Message not available
- Re: How do you stop outgoing spam? Brad Knowles (Sep 17)
- Re: How do you stop outgoing spam? Valdis . Kletnieks (Sep 17)
- Re: How do you stop outgoing spam? Brad Knowles (Sep 17)
- Message not available
- Re: How do you stop outgoing spam? Brad Knowles (Sep 17)
- Re: How do you stop outgoing spam? Valdis . Kletnieks (Sep 10)
- Re: How do you stop outgoing spam? Barry Shein (Sep 10)
- RE: How do you stop outgoing spam? Al Rowland (Sep 10)
- RE: How do you stop outgoing spam? alex (Sep 10)
- Re: How do you stop outgoing spam? Majdi S. Abbas (Sep 10)
- Re: How do you stop outgoing spam? Richard A Steenbergen (Sep 10)