Known Hack attempts: cltreq.asp and owssvr.dll

[speedy]

The following 404 errors are not from attempts to hack your site. Instead, they are simply natural requests caused by various applications.
MS Internet Explorer + Microsoft Office

For users who have installed Microsoft Office and are browsing your site via Internet Explorer with the Discuss toolbar enabled, the browser will query your server for the following files to see if the Office Server Extensions are enabled. Unless you have installed them on a Windows server, these files will simply return a harmless 404.

<table class="tbl_stats_tight" width="600"><tbody><tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=4219&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=4518&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=6254&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=6403&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/MSOffice/cltreq.asp?UL=1&ACT=4&BUILD=6551&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=2614&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=4219&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=4518&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=6254&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=6403&STRMVER=4&CAPREQ=0</td></tr> <tr><td>/_vti_bin/owssvr.dll?UL=1&ACT=4&BUILD=6551&STRMVER=4&CAPREQ=0</td></tr></tbody></table>