Sun Java System Web Proxy Server 4 includes the following enhancements:
Modern HTTP core
Support for Linux and the SolarisTM x86 platform
Modern SSL (Secure Sockets Layer) support on all platforms
Multi-threaded architecture on all platforms
Improved administration, graphical user interface, and ease of management
New NSAPI (Netscape Server Application Programmer’s Interface) filters
Increased LDAP (Lightweight Directory Access Protocol) performance
Improved scalability and performance
Improved content filtering
Implementation of the server.xml configuration file
More information about new features and enhancements can be found in the Proxy Server Release Notes, available at: http://docs.sun.com/app/docs/coll/1311.1