WebCenter Portal 11.1.1.8 is part of Oracle Fusion Middleware 11g Release 1 Version 11.1.1.8.

Oracle WebCenter Suite is an integrated suite of Fusion Middleware 11gR1 tools used to create web sites and portals using service-oriented architecture (SOA). Applications adapters are also available.

WebCenter Portal 11.1.1.8 is now certified with Oracle E-Business Suite Release 12.2. This complements our existing certifications of WebCenter Portal 11.1.1.8 with EBS 12.0 and 12.1. WebCenter Portal 11.1.1.8 is part of Oracle Fusion Middleware 11g Release 1 Version 11.1.1.8.0, also known as FMW 11gR1 Patchset 7.
Certified Platforms
Oracle WebCenter Portal is certified to run on any operating system for which Oracle WebLogic Server 11g is certified. For information on operating systems supported by Oracle WebLogic Server 11g and Oracle WebCenter Portal, refer to the 'Oracle Fusion Middleware on WebLogic Server - System Certification' in the Oracle Fusion Middleware 11g Release 1 (11.1.1.x) Certification Matrix.
Integration with Oracle WebCenter Portal involves components spanning several different suites of Oracle products. There are no restrictions on which platform any particular component may be installed so long as the platform is supported for that component.
Migrating to Oracle WebCenter
If you're currently using Oracle Portal, you should be aware that Portal is now in maintenance mode. Updates with bug fixes will continue to be produced, but you should consider migrating to Oracle WebCenter for ongoing new features.