nanog mailing list archives
Re: ISP port blocking practice
From: Doug Barton <dougb () dougbarton us>
Date: Fri, 03 Sep 2010 15:41:53 -0700
On 9/3/2010 3:19 PM, John R. Levine wrote:
I know people at large ISPs with actual data. Port 25 blocking is quite effective.
Well no one has said it in this thread yet, so I guess it's my turn. :)When talking about spam it often happens that people make statements along the lines of, "Spam still exists, therefore $FOO is not an effective countermeasure." I chose to respond to this message to say that this line of thinking is flawed because this message (to some degree at least) demonstrates that blocking 25 outbound IS effective (again, to some degree); which leads to my larger point. There is no one magic bullet for spam. It's a hydra of a problem if there ever was one, and _every_ option needs to be weighed, both the costs and the benefits. I know that a lot of you know this, but the consistent repetition of the same logical fallacy just gets under my skin, and like I said, it was my turn.
Doug
Current thread:
- Re: ISP port blocking practice, (continued)
- Re: ISP port blocking practice Curtis Maurand (Sep 03)
- Re: ISP port blocking practice Dobbins, Roland (Sep 03)
- Re: ISP port blocking practice Kevin Oberman (Sep 04)
- Re: ISP port blocking practice Owen DeLong (Sep 03)
- Re: ISP port blocking practice Butch Evans (Sep 03)
- Re: ISP port blocking practice Owen DeLong (Sep 03)
- Re: ISP port blocking practice John Levine (Sep 03)
- Re: ISP port blocking practice Owen DeLong (Sep 03)
- Re: ISP port blocking practice John R. Levine (Sep 03)
- RE: ISP port blocking practice Paul Stewart (Sep 03)
- Re: ISP port blocking practice Doug Barton (Sep 03)
- Re: ISP port blocking practice Franck Martin (Sep 03)
- Re: ISP port blocking practice Owen DeLong (Sep 03)
- Re: ISP port blocking practice John R. Levine (Sep 03)
- Re: ISP port blocking practice Robert E. Seastrom (Sep 08)
- RE: ISP port blocking practice Brian Johnson (Sep 12)
- Re: ISP port blocking practice Patrick W. Gilmore (Sep 03)
- Re: ISP port blocking practice Ricky Beam (Sep 03)
- Message not available
- Re: ISP port blocking practice Patrick W. Gilmore (Sep 03)
- Re: ISP port blocking practice Claudio Lapidus (Sep 05)
- Re: ISP port blocking practice Patrick W. Gilmore (Sep 05)