Request routing using the plug-in
The Web server plug-in uses an XML configuration file to determine whether a request is for the Web server or the appserver. When a request reaches the Web server, the URL is compared to those managed by the plug-in. If a match is found, the plug-in configuration file contains the information needed to forward that request to the Web container using the Web container inbound transport chain.
The plug-in configuration file is generated using the WebSphere administrative tools. Each time you make a change to the WAS configuration that would affect how requests are routed from a Web server to the appserver, regenerate and propagate the plug-in configuration file to the Web server. You can propagate manually or configure it to be done automatically.