nanog mailing list archives
Re: BCP38 thread 93,871,738,435
From: "Steven M. Bellovin" <smb () cs columbia edu>
Date: Thu, 26 Oct 2006 13:03:54 -0400
On Thu, 26 Oct 2006 17:07:32 +0200, Florian Weimer <fw () deneb enyo de> wrote:
* Steven M. Bellovin:As you note, the 20-25% figure (of addresses) has been pretty constant for quite a while. Assuming that subverted machines are uniformly distributed (a big assumption)I doubt this assumption about distribution is valid. At least over here, consumer-grade ISPs (think DSL with dynamic IP addresses) apply ingress filters, while real ISPs don't. If you're lucky, you get egress filters at some border routers, but it's not standard at all. Customer-facing interfaces are generally unfiltered.
Those are good points. It would be interesting to look at the raw AS data and see what classes of organizations were represented. Unfortunately, that data is not publicly available, according to the FAQ for that project. --Steven M. Bellovin, http://www.cs.columbia.edu/~smb
Current thread:
- Re: BCP38 thread 93,871,738,435 (was Re: register.com down sev0?) Fergie (Oct 25)
- Re: BCP38 thread 93,871,738,435 (was Re: register.com down sev0?) Sean Donelan (Oct 25)
- Re: BCP38 thread 93,871,738,435 (was Re: register.com down sev0?) Per Heldal (Oct 26)
- Re: BCP38 thread 93,871,738,435 (was Re: register.com down sev0?) Steven M. Bellovin (Oct 26)
- Re: BCP38 thread 93,871,738,435 Florian Weimer (Oct 26)
- Re: BCP38 thread 93,871,738,435 Steven M. Bellovin (Oct 26)
- Re: BCP38 thread 93,871,738,435 + SPF Douglas Otis (Oct 26)
- Re: BCP38 thread 93,871,738,435 + SPF Michael . Dillon (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Chris L. Morrow (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Michael . Dillon (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Chris L. Morrow (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Douglas Otis (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Gadi Evron (Oct 27)
- Re: BCP38 thread 93,871,738,435 + SPF Douglas Otis (Oct 29)
- Re: BCP38 thread 93,871,738,435 + SPF Gadi Evron (Oct 29)
- Re: BCP38 thread 93,871,738,435 + SPF Douglas Otis (Oct 29)
- Re: BCP38 thread 93,871,738,435 (was Re: register.com down sev0?) Sean Donelan (Oct 25)