[136790] in North American Network Operators' Group
Re: quietly....
daemon@ATHENA.MIT.EDU (Jack Bates)
Fri Feb 4 21:54:39 2011
Date: Fri, 04 Feb 2011 20:53:36 -0600
From: Jack Bates <jbates@brightok.net>
To: Owen DeLong <owen@delong.com>
In-Reply-To: <F53DE16F-1259-4845-962C-04F35521F8F5@delong.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2/4/2011 8:05 PM, Owen DeLong wrote:
>
> True... If you review the NANOG archives you'll find that at least in the case
> of the port 25 absurdity, I have noticed and have railed against it.
>
Yeah, I threw it in as an afterthought. ISP firewalls do exist and not
just small isolated incidents. I wish more money had gone into making
them much more adaptive, then you could enjoy your tcp/25 and possibly
not have a problem unless your traffic patterns drew concerns and caused
an adaptive filter to block it (eh? thousands of emails suddenly to a
variety of servers? block). Interestingly, adaptive filters are often
used for probing scans (and we didn't apply them to tcp/25, why?)
Jack
