Install URLScan on your Web server

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- J.D. Meier, Alex Mackman, Michael Dunner, Srinath Vasireddy, Ray Escamilla and Anandha Murukan

URLScan is an ISAPI filter that is installed when you run the IISLockdown tool. This helps mitigate the threat of XSS attacks by rejecting potentially malicious input. For more information about IISLockdown and URLScan, see Chapter 16, "Securing Your Web Server." at

Note IIS 6.0 on Windows Server 2003 has functionality equivalent to URLScan built in.


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