If you have been following my posts on Sun Portal Server, you'll know by now that it is now called Sun Glassfish Web Space Server 10.0. (Why 10.0? I do not know. I do know the last Sun Portal Server was 7.2)
Glassfish Web Space Server is actually code-based from LifeRay Portal Server. But it offers something more - Add-On Collection ... which I like about.
One of them is Secure Web Access Add-On.
The Secure Web Access Add-On for GlassFish Web Space Server software enables remote Internet users to securely access a Website via a browser.Integration with GlassFish Web Space Server ensures that users receive secure encrypted access to the content and services that they have permission to access.Secure Web Access software is targeted towards enterprises deploying highly secure remote access portals. These portals emphasize security, protection, and privacy of intranet resources.
This was what made Sun Portal Server attractive during its heydays. It was formerly known as Sun Java System Portal Server Secure Remote Access (SRA).
It sits in-between 2 firewalls which makes your remote access to your intranet applications more secured.
Read here for more information.