http://weblog.west-wind.com/posts/2012/Oct/25/Caveats-with-the-runAllManagedModulesForAllRequests-in-IIS-78
<modules runAllManagedModulesForAllRequests="false">
<add
name="authFilter" type="Jet.Com.ReqFilter,Jet.Com"
preCondition="managedHandler"/>//必须加上preCondition属性
</modules>
IIS7中的httpmodule如何不处理非asp.net请求
原文：http://www.cnblogs.com/aloha/p/3564992.html