Webdynpro ABAP from enterprise portal

Hi,

We have an portal which can be accessed from internet through webdispatcher. Now we have developed certain Webdynpro ABAP based based application in (R3). The WD ABAP iviews are been created on portal. But we are not able to access this application when portal is opened from internet.

The R3 is not available on internet. So how can we manage these thing so that Webdynpro ABAP can be accessed from internet?