VasPatch stands for Virtual Application Security Patch. 

It is a free virtual patching tool which protects your web applications from hacker attacks. VasPatch provides a web interface for users to create and customize rules based on their website protection requirements. It then filters (or blocks) malicious access and attacks to web applications based on the rules.  As a web server module, every web request sent to the web server would be inspected by VasPatch. Malicious requests could be blocked, filtered and logged. 

A sample set of rules for vulnerabilities of Joomla CMS (a popular Content Management System) is now available in VasPatch Repository . Joomla administrators could use them to patch recent vulnerabilities of Joomla CMS and its extensions.

Currently, VasPatch is for IIS web server only.