nanog mailing list archives
Re: botted hosts
From: dlr () bungi com (Dave Rand)
Date: Mon, 4 Apr 2005 01:48:47 -0700
[In the message entitled "Re: botted hosts" on Apr 4, 1:10, Sean Donelan writes:]
On Sun, 3 Apr 2005, Dave Rand wrote:The Kelkea (what used to be MAPS) DUL, with more than 150 million entries in it stopped about 41% of the spam last month. The QIL, a new product, stopped about 55%, with the remainder being stopped by the RBL, OPS and RSS. A view of this from a different perspective (an unrelated ISP) is available at http://status.hiwaay.net/spam.html That means that if just the ISPs that we have identified as having "dynamically assigned" addresses were to install port 25 blocking, more than 1/3 of the spam would vanish.Why does anyone accept SMTP conenctions from known "dynamically assigned" addresses? DUL, QIL, etc should drop all those connections on the floor. If everyone was using DUL, QIL, etc, why do they still complain about getting spam from dynamically assigned addresses? If mail admins were to install DUL lists .... Does port 25 blocking actually make a difference? Any public data from before and after? Or does it just annoy people, cause problems and not fix anything?
I would not complain, mind you - having more customers is good for my business. But why do you think it is right to shift the burden on the recipient to block access, when it could be done at the source. Yes, it means that the people getting the cash from the customer would have to actually support said customer by making it non-annoying for them. Blocking port 25 has been a good idea for 8 years. Many ISPs have already done it (some better than others), and it absolutely does fix things. --
Current thread:
- Re: botted hosts, (continued)
- Re: botted hosts Florian Weimer (Apr 04)
- Re: botted hosts Suresh Ramasubramanian (Apr 04)
- Re: botted hosts Petri Helenius (Apr 05)
- Re: botted hosts Petri Helenius (Apr 04)
- Re: botted hosts Valdis . Kletnieks (Apr 04)
- Re: botted hosts Peter Corlett (Apr 04)
- Re: botted hosts Florian Weimer (Apr 04)
- Re: botted hosts Peter Corlett (Apr 04)
- Re: botted hosts Petri Helenius (Apr 04)
- RE: botted hosts Ejay Hire (Apr 07)
- Re: botted hosts Sean Donelan (Apr 04)
- Message not available
- Re: botted hosts Jay R. Ashworth (Apr 04)
- Re: botted hosts Paul Vixie (Apr 04)
- so, how would you justify giving users security? [was: Re: botted hosts] Gadi Evron (Apr 04)
- Re: so, how would you justify giving users security? [was: Re: botted hosts] J.D. Falk (Apr 04)
- Re: so, how would you justify giving users security? [was: Re: botted hosts] Gadi Evron (Apr 04)
- Re: so, how would you justify giving users security? [was: Re: botted hosts] Petri Helenius (Apr 04)
- Message not available
- Re: so, how would you justify giving users security? [was: Re: botted hosts] Jay R. Ashworth (Apr 04)
- Re: so, how would you justify giving users security? [was: Re: botted hosts] John Dupuy (Apr 04)