nanog mailing list archives
Re: Port 25 - Blacklash
From: Adam Jacob Muller <adam () gotlinux us>
Date: Tue, 26 Apr 2005 14:17:55 -0400
The fact that most people did not complain is not likely due to the fact that they were not annoyed by the change, but rather it's easier to simply get around it than it is to bother complaining to network admins.
For example, about 2 months ago, comcast decided to block outgoing port 25 from my entire neighborhood. I called comcast, and while sitting on hold I had the idea to setup a ssh tunnel to a machine at work and viola problem solved before anyone from comcast even answered the phone.
Adam On Apr 26, 2005, at 2:03 PM, Eric Gauthier wrote:
Paul,For any educational institutions on this list - what has been the impact on your mail services once your ISP started blocking port 25 - what if any was the backlash - and how difficult was it to provide alternatives ... 587,465etc ...Our ISPs don't filter our traffic. If they consistently did, they probablywouldn't be our ISPs for long. OTOH, the question that you didn't ask was if educational institutions themselves are blocking port 25 from their users :) In our case, yes we are. We only allow SMTP connections from our dorm subnets to the campus mail servers. Personally, I thought therewas going to be a huge backlash from our community when we put this in about a year ago. Of the 12,000 students that this affected, I believe two haveinquired about it but didn't really have an issue with it. Eric :) !DSPAM:426e832d147596632912183!
Current thread:
- FW: Port 25 - Blacklash Paul Ryan (Apr 26)
- Re: FW: Port 25 - Blacklash Matt Ghali (Apr 26)
- Re: FW: Port 25 - Blacklash Eric Gauthier (Apr 26)
- Re: Port 25 - Blacklash Adam Jacob Muller (Apr 26)
- Re: Port 25 - Blacklash Hank Nussbacher (Apr 26)
- Re: Port 25 - Blacklash Valdis . Kletnieks (Apr 26)
- Re: Port 25 - Blacklash Daniel Golding (Apr 26)
- Re: Port 25 - Blacklash Alexei Roudnev (Apr 27)
- Re: Port 25 - Blacklash Joel Jaeggli (Apr 27)
- Re: Port 25 - Blacklash Suresh Ramasubramanian (Apr 27)
- Re: Port 25 - Blacklash Joe Maimon (Apr 27)
- Re: Port 25 - Blacklash Valdis . Kletnieks (Apr 27)
- Re: Port 25 - Blacklash Suresh Ramasubramanian (Apr 27)
- Re: Port 25 - Blacklash Adam Jacob Muller (Apr 26)
- Re: Port 25 - Blacklash Matthew S. Hallacy (Apr 27)