ModSecurity extension for IIS

Microsoft announced the popular open source security module ModSecurity for the IIS platform is coming.
Over the last few years Microsoft has developed a number of tools capable of mitigating selected web specific vulnerabilities (for example, UrlScan). To help on this front we have participated in a community effort to bring the popular open source module ModSecurity to the IIS platform.

Have a look: Announcing the availability of ModSecurity extension for IIS