[84472] in North American Network Operators' Group
Re: Computer systems blamed for feeble hurricane response?
daemon@ATHENA.MIT.EDU (Joseph S D Yao)
Tue Sep 13 17:27:02 2005
Date: Tue, 13 Sep 2005 17:23:12 -0400
From: Joseph S D Yao <jsdy@center.osis.gov>
To: "Steven M. Bellovin" <smb@cs.columbia.edu>,
Mike Tancsa <mike@sentex.net>, nanog@nanog.org
Mail-Followup-To: "Steven M. Bellovin" <smb@cs.columbia.edu>,
Mike Tancsa <mike@sentex.net>, nanog@nanog.org
In-Reply-To: <20050913205658.GL16110@core.center.osis.gov>
Errors-To: owner-nanog@merit.edu
On Tue, Sep 13, 2005 at 04:56:58PM -0400, Joseph S D Yao wrote:
> On Tue, Sep 13, 2005 at 04:28:41PM -0400, Steven M. Bellovin wrote:
> ...
> > Telnet options, and for that matter speed, happen after the 3-way
> > handshake. We're not getting that far.
> >
> > --Steven M. Bellovin, http://www.cs.columbia.edu/~smb
>
> Steve, I defer to your expertise, as always. ;-]
Nevertheless ... I went looking for comments on how this was being done,
and found the following specualtion by a small number of different
people.
"SEF [is] unique in that it can detect what appear to be telnet
connections to Port 25 and drop the connection. This is probably because
telnet connections send one character at a time whereas real SMTP
clients send all the strings at once."
This would not require the 3WH, ISTM.
--
Joe Yao
-----------------------------------------------------------------------
This message is not an official statement of OSIS Center policies.
