Got IIS Problems? Check the URLScan logs

We all run IISLockdown on our computers, because we are security-conscious developers, right?

If you have and you are having any sort of IIS problems, make sure to check the URLScan logs.  You can find them at %WINDOWS%\system32\inetsrv\urlscan.  If any requests are being rejected due to URLScan filters, the log file will show the reason why a request was rejected.

I spent half-an-hour trying to figure out why the computer couldn’t find my BizTalkServerRepository.  Aaargh!

This entry was posted in Uncategorized. Bookmark the permalink. Follow any comments here with the RSS feed for this post.

8 Responses to Got IIS Problems? Check the URLScan logs

  1. Adam Ramsden says:

    I am currently using iis 5.0 to host a created website on my internal ip. All my settings for default website are correct, but suddenly i cannot view the site in firefox or i.e. The error msg i recieve is page error, page cannot be displayed, or in firefox to contact my system admin as the page could not be executed?

    I have no idea! Help!

  2. Bharathi says:


    I am trying to install Application SErver (IIS) on Windows 2003 server. Add/Rmove Windows Componenets, I had the Windows 2003 Enterprise edition Disc, it does not recognise the file and gives me the roor "Setup cannot copy the file convlog.ex_" The file is right there, but it has problems reading the file. Please help me.



  3. George says:

    I am trying to install a software on Windows 2003 IIS 6.0 that runs on ASPpages qualified on IIS 5.0 and the installation fails giving me an error requesting that I re-install IIS. I get this error even though IIS 6.0 is installed and running.

  4. Darrell says:

    Seth – that tool tells you if something is wrong, which is easy enough to tell by checking the log.

    Better yet, I wrote a tool that shows a popup window whenever the URLScan log is modified by URLScan (indicating a rejected request). Check it out here:

  5. Seth says:

    Online spot to check your urlscan logs.


  6. Darrell Norton's Blog says:

    URLScan Watcher – find out when the URLScan log file changes

  7. Darrell says:

    Brian – yes, I ran into the exact same thing on an internal web project that had dots in the URL. Man was that frustrating.

  8. Brian Broom says:

    I ran into the same problem installing flexwiki. URLScan was rejecting requests because of dots in the filename. Didn’t figure that out untill I tried to figure out why certain requests made it to the iis logs and some did not.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>