How to configure ITS on IIS

Hi all,

we have SAP ECC 6.0 and we have configured the ITS, from internal network

I can connect to webgui by this url http://sap_machine_hostname:8000/sap/bc/gui/sap/its/webgui

Now I want configure IIS on web server to connect at ITS on the SAP server (are two separate servers), what do i have to do?

Now I have created in IIS a new web site and I have redirected the index to the ITS url ,

clearly this method work from internal but I want reach ITS from external link.

Thank you.