WCF Service with netTcpBinding + windows Authentication hosted with IIS and using roles for authorization

I am having a WCF Service which is hosted with IIS with nettcpbinding and Win开发者_运维问答dows authentication, I am trying to do authorization with user name/roles. But service is allowing any user to access it.

Is this possible in first place?

---

It sounds like you have some soft of configuration error. IIS does not allow for hosting of WCF with the nettcp binding. You'll need to host your WCF in a Windows Service or WAS (only in Windows Server 2008). See Learning WCF, by Michele Leroux Bustamante for an excellent reference on how to do this.