The Dynamic IP Restrictions Extension for IIS provides IT Professionals and Hosters a configurable module that helps mitigate or block Denial of Service Attacks or cracking of passwords through Brute-force by temporarily blocking Internet Protocol (IP) addresses of HTTP clients who follow a pattern that could be conducive to one of such attacks. This module can be configured such that the analysis and blocking could be done at the Web Server or the Web Site level.
UrlScan 3.1 is a security tool that restricts the types of HTTP requests that IIS will process. By blocking specific HTTP requests, the UrlScan 3.1 security tool helps to prevent potentially harmful requests from reaching applications on the server. UrlScan 3.1 is an update to UrlScan 2.5 supports IIS 5.1, IIS 6.0 and IIS 7.0 on Windows Vista and Windows Server 2008.