nanog mailing list archives
Re: Unplugging spamming PCs
From: Brett <bretton () gmail com>
Date: Wed, 23 Jun 2004 10:32:24 -0700
My bad! I was too busy with that pesky little thing called "work" to scrutinize my grammar before I sent ;-) It is reactive, but they are at least doing something. Completely blocking port 25 (except to comcast mail servers) will stop zombies, but not people intentionally sending spam. Anyone with a shell account can still forward traffic from an arbitrary port to 25 on an open relay. They are definitely not taking the "hard line against spam" either, but at least they are making an effort. On Wed, 23 Jun 2004 12:07:27 -0500 (CDT), Sam Hayes Merritt, III <sam () themerritts org> wrote:
On Wed, 23 Jun 2004, Brett wrote:At least they now realize they are one of the worst and are finally becoming proactive: http://zdnet.com.com/2100-1104-5230615.html They are also starting to block port 25.That is still reactive (first the abuse has to occur, then you try and filter anymore from occuring), at least they might be now be doing something that everyone else has been doing for years. So far today we've only blocked 3381 attempts from dynamic comcast.net space to send email to our users. Proactive would be blocking port 25 except to comcast.net's mail servers, at least on retail users without static IPs, and then opening it up if the customer cannot work around it by using comcast's mail server to send out. Thats what responsible ISPs have done. sam
Current thread:
- Unplugging spamming PCs Hank Nussbacher (Jun 22)
- Re: Unplugging spamming PCs William Warren (Jun 23)
- Re: Unplugging spamming PCs Brett (Jun 23)
- Re: Unplugging spamming PCs Sam Hayes Merritt, III (Jun 23)
- Re: Unplugging spamming PCs Brett (Jun 23)
- Re: Unplugging spamming PCs Paul Vixie (Jun 23)
- Re: Unplugging spamming PCs Ben Browning (Jun 23)
- Re: Unplugging spamming PCs Petri Helenius (Jun 23)
- Re: Unplugging spamming PCs Brett (Jun 23)
- Re: Unplugging spamming PCs Doug White (Jun 23)
- Re: Unplugging spamming PCs William Warren (Jun 23)
- <Possible follow-ups>
- RE: Unplugging spamming PCs Larry Pingree (Jun 23)
- Re: Unplugging spamming PCs Peter Corlett (Jun 23)
- Re: Unplugging spamming PCs Michael . Dillon (Jun 24)
- Re: Unplugging spamming PCs Henry Linneweh (Jun 24)
- Re: Unplugging spamming PCs Peter Corlett (Jun 23)
- Re: Unplugging spamming PCs Chris Horry (Jun 24)