[80142] in North American Network Operators' Group
Re: Port 25 - Blacklash
daemon@ATHENA.MIT.EDU (Adam Jacob Muller)
Tue Apr 26 14:18:58 2005
In-Reply-To: <20050426180342.GA16058@roxanne.org>
Cc: Paul Ryan <pryan@rogers.wave.ca>,
Nanog Mailing list <nanog@merit.edu>
From: Adam Jacob Muller <adam@gotlinux.us>
Date: Tue, 26 Apr 2005 14:17:55 -0400
To: Eric Gauthier <eric@roxanne.org>
Errors-To: owner-nanog@merit.edu
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 ...
>> 587,465
>> etc ...
>>
>
> Our ISPs don't filter our traffic. If they consistently did, they
> probably
> wouldn'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 there
> was 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 have
> inquired about it but didn't really have an issue with it.
>
> Eric :)
>
>
> !DSPAM:426e832d147596632912183!
>
>
