Plug-ins are small software programs that developers use to extend a WebLogic Server implementation. Plug-ins enable WebLogic Server to communicate with applications deployed on Apache HTTP Server, Netscape Enterprise Server, or Microsoft's Internet Information Server. Typically, WebLogic Server handles the application requests that require dynamic functionality, the requests that can best be served with dynamic HTML pages or JSPs (Java Server Pages).
WebLogic Server Plug-Ins do not support two-way SSL. However, the Plug-Ins can be set up to require the client certificate and pass it on to WebLogic Server. For example: