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Re: Clearing IIS logs
From: "Tiago Halm" <thalm () netcabo pt>
Date: Thu, 4 Oct 2001 19:21:47 +0100

This might seem rather silly, but I was thinking
of opening the log file in sharable read/write mode
using a kind of NT service which would start before
IIS.

That way you could do whatever you want to the file
while the NT Service and IIS had it open.

But this poses 2 questions

1. Does IIS open the file in lock read/write mode ?
If this is the case, then this won't work.

2. What to do when IIS changes log file (at 00:00) ?
Well, you could make the NT service create a file
just before 00:00 so that IIS would use it also.

I'm writing this now, but haven't tested it yet, so probably
it wont work.

Just my 2 something!

Tiago Halm

----- Original Message -----
From: "Travis Kiger" <Travis.Kiger () dig com>
To: "'Shoten'" <shoten () starpower net>; "Jason binger"
<cisspstudy () yahoo com>; <pen-test () securityfocus com>
Sent: Tuesday, October 02, 2001 8:10 PM
Subject: RE: Clearing IIS logs


Hmm, I tried it with an IIS4 machine using the IIS log format. After
deleting the current log and renaming an old log, new requests were
appended
to the old log, although this format does include the date in each entry.

XXX.XXX.XXX.XXX, -, 6/13/01, 16:10:53, W3SVC1, SERVER, YYY.YYY.YYY.YYY, 0,
258, 623, 404, 2, GET, /images/homepage/icon.gif, -,
XXX.XXX.XXX.XXX, -, 6/13/01, 16:10:53, W3SVC1, SERVER, YYY.YYY.YYY.YYY, 0,
260, 623, 404, 2, GET, /images/homepage/icon.gif, -,
XXX.XXX.XXX.XXX, -, 6/13/01, 16:10:53, W3SVC1, SERVER, YYY.YYY.YYY.YYY, 0,
256, 623, 404, 2, GET, /images/homepage/base.gif, -,
XXX.XXX.XXX.XXX, -, 6/13/01, 16:10:53, W3SVC1, SERVER, YYY.YYY.YYY.YYY,
125,
256, 390, 200, 0, GET, /images/html_corner.gif, -,
XXX.XXX.XXX.XXX, -, 10/2/01, 12:06:23, W3SVC1, SERVER, YYY.YYY.YYY.YYY,
15,
564, 206, 304, 0, GET, /index.html, -,
XXX.XXX.XXX.XXX, -, 10/2/01, 12:06:23, W3SVC1, SERVER, YYY.YYY.YYY.YYY, 0,
627, 141, 304, 0, GET, /global.js, -,
XXX.XXX.XXX.XXX, -, 10/2/01, 12:06:23, W3SVC1, SERVER, YYY.YYY.YYY.YYY, 0,
622, 141, 304, 0, GET, /home.css, -,



-----Original Message-----
From: Shoten [mailto:shoten () starpower net]
Sent: Tuesday, October 02, 2001 11:41 AM
To: Travis Kiger; Jason binger; pen-test () securityfocus com
Subject: Re: Clearing IIS logs


The problem with this method is that IIS will not continue the existing
log
file, but rather create a new one.


IIS keeps the log file open, so I don't know of a way to do it without
stopping IIS. The easiest way to acccomplish this is to create an AT job
that stops IIS, deletes the logs and then restarts IIS. The account that
the
AT service runs as probably has permissions to do this. To cause even
more
confusion for the admin, copy an old log and give it the same name as
todays' log. Some log types don't show the date in the individual
entries,
but the admin may not notice either way.


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