I'm willing to bet this is with IIS, correct?

IIS is causing the timeouts.  But it gets worse.

For example, if someone on our lan tries to upload a 50meg file using CFFILE
on ANY of the IIS servers on campus, it will send the IIS server off to
neverland until the transfer is eventually aborted.  The lovely part of this
is IIS is gobbling ALL of the Cpu during the transfer.  As such all other
requests to the server timeout while it is locked up with the attempted
transfer.  A very simple and effective DoS attack.

Microsoft essentially acknowledges the bug and directs their ASP users to
code around the  bug by either using a COM object or a JAVA applet to handle
the file transfer, thus bypassing the webserver.

We recently discovered this 'feature' with CFFILE.  Our problem is, the main
instance of the problem happens with a CF application we purchased from a
vendor (ektron) who seems unwilling to either mod the app, or allow us to
mod the app to workaround the issue.

Some people are pointing you to look at the client (browser).  While some
clients get this and others don't, its simply a function of bandwidth.  If
the user is only sending at 2k/s they can upload large files as long as they
are patient.  However, when they have a 100mbit connection to the webserver,
good luck!.


Trey Rouse
Data Application  Architect
Web Services - Rice University

-----Original Message-----
From: Michael E. Carluen [mailto:[EMAIL PROTECTED]]
Sent: Monday, January 20, 2003 1:40 PM
To: CF-Talk
Subject: CFserver Timesout when uploading a 13mb file


I have a 13mb .doc file being uploaded using a simple CFFILE. The server
timesout.  After I zipped the file down to a 9mb file, it was OK.  Does
anyone know what triggers the limitation?

Thanks
Michael


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