title: How to redirect to a custom error page using mod_rewrite based on 404 error
body: <p>I am trying to use mod_rewrite to be able to redirect to my custom html error page, when a 404 is returned. Right now, I have my http server running and my appserver(Websphere) running. When I take down a service on the appserver, it returns a message as follows:</p>
  
  <p>SRVE0255E: A WebGroup/Virtual Host to handle localhost:80 has not been defined.</p>
  
  <p>I want to be able to redirect to my custom error message, based on the response, rather than show this error message. Trying to use the ErrorDocument directive within the httpd.conf file does not work,... but I have heard that this is possible to do with mod_rewrite. I am not sure how to do this.</p>