Extending : IBM WebSphere Portal extension
  
IBM WebSphere Portal extension
IBM WebSphere Portal is a powerful solution for delivering engaging web content and applications in an integrated, differentiated and personalized web experience.
Web Application Bridge (WAB)
Web Application Bridge is a Portal 8.0 component to ingrate with web applications, such as Sharepoint and UNICOM® Digital Transformation Toolkit (UDTT™) applications.
The web application bridge uses reverse proxy technology to integrate web-based content providers, such as the Microsoft SharePoint 2007 server or a UDTT application, with IBM WebSphere Portal. Administrators must first define the virtual web applications or content providers. A lightweight IFrame portlet displays the content from the backend applications. Users can then access the IFrame on a page without requiring direct network access to the backend application. A special engine maps Uniform Resource Identifiers (URIs) on the iFrame portlet to real URIs from the content providers.
Integrating the web application bridge with WebSphere Portal is a multistep process. The first part of the process is creating an application component from the Web application bridge manager portlet. The second part requires that you add the Web Dock portlet on a page and then configure it to point to the appropriate application component.
See
Overview
Setup UDTT Application Server
Setup Portal Server Machine
Setup the collaboration between IBM WebSphere Portal server and the UDTT application server