The mod_wl_ohs module is a key feature of Oracle HTTP Server that enables requests to be proxied from Oracle HTTP Server to Oracle WebLogic Server. This module is generally referred to as the Oracle WebLogic Server proxy plug-in.
The mod_wl_ohs module enhances an Oracle HTTP server installation by allowing Oracle WebLogic Server to handle requests that require dynamic functionality. In other words, you typically use a plug-in where the HTTP server serves static pages such as HTML pages, while Oracle WebLogic Server serves dynamic pages such as HTTP Servlets and Java Server Pages (JSPs). For information on this module's directives, see Parameters for Web Server Plug-Ins in Using Oracle WebLogic Server Proxy Plug-Ins.