- Windows NT 4.0 SP6a
- Windows 2000
- Windows XP
- Internet Information Services 4.0
- Internet Information Services 5.0
- Internet Information Services 5.1
Microsoft released the very useful (and necessary) IIS Lockdown 1.0 in August 2001, and updated it to version 2.1 in the November of the same year, adding support for IIS 5.1 and bundling the URLScan 6.0.3547.0 filter ISAPI extension.
The URLScan component was updated to URLScan 2.5 (6.0.3615.0) in an unceremonious fashion in May 2003 to provide an updated ISAPI and, presumably, some IIS 6 support.
It’s not easy to even find URLScan 2.5 in the Microsoft download centre, but it is there, appearing in the search listings as “Setup.exe”.
If you want to bring a new Windows NT4/5.x Server box up to spec you will invariably use IIS Lockdown, which will install URLScan 6.0.3547.0, restart the IIS Services (or restart in the case of NT4). Bring the system backup, uninstall the IIS Lockdown URLScan, repeat the service restart and finally install URLScan 2.5 and – you guessed it – restart the services a third time.
My theory is “why bother” with that, I just reintegrated the new 2003 version of URLScan into the IIS Lockdown 2.1 installer and voila one install, one service reset, give yourself a pat on the back and go make a cup of tea.
IIS Lockdown 2.1.1 C:Amie Edition : Download : 193KB
If you don’t believe it works, the server you are connecting too right now is using it! (assuming this is still a Windows 2000 Server when you read this).
What is new in URLScan 2.5?
Good question, there isn’t any documentation on the 2.5 release (the readme in my 2.1.1 redist is the original version’s). The default configuration script has been expanded with some new variables.
You can now control how and where URLScan logs too – useful as the original version dumps logs in the Inetsrv\URLscan folder in a rather untidy manner.
A new query string control and maximum file request is also a new feature, allowing you to prevent people from sucking the life out of a persistent HTTP connection.