It is COMMON practise to have web and app servers on different machines. WebSphere provides a plug-in which enables web server to talk to application server, this is known as web server plug-in. Web server plug-in will have a configuration file NAMED plugin-config.xml which will have referenes to all the servers, clusters, APPLICATIONS, virtual hosts of the websphere application server. You can generate this configuration file from ADMINISTRATION console, servers –>web servers. SELECT a web server and click generate plugin configuration file and then propagate the plugin. This plug-in needs to be installed on the web server machine

It is common practise to have web and app servers on different machines. WebSphere provides a plug-in which enables web server to talk to application server, this is known as web server plug-in. Web server plug-in will have a configuration file named plugin-config.xml which will have referenes to all the servers, clusters, applications, virtual hosts of the websphere application server. You can generate this configuration file from administration console, servers –>web servers. Select a web server and click generate plugin configuration file and then propagate the plugin. This plug-in needs to be installed on the web server machine