Sun One Web Proxy Server 3.6 (also known as iPlanet Web Proxy Server) can be migrated to Sun Java System Web Proxy Server 4. The 3.6 server is preserved, and a new version 4 server with the same settings is created. For more information about migrating a server from version 3.6 to version 4, see Sun Java System Web Proxy Server 4.0.4 Installation and Migration Guide. Also see the online help for migration-related pages in the Proxy Server user interface. For information about migrating certificates, see Migrating Certificates From Previous Versions in this guide.