Accessing a non-existing page or providing wrong credentials on a protected page throws an HTTP 401 error with the Tomcat version. This issue happens on the Windows platform in the following scenarios:
When Identity Server is the only component installed on the Windows server.
Access Gateway Service is installed on Windows.
This issue does not happen on the Linux platform.
Perform the following steps to stop error pages to display the Tomcat version:
Go to C:\Program Files\Novell\Tomcat\lib and run "C:\Program Files\Java\<jdk version>\bin\jar" -xf catalina.jar
Move catalina.jar to another folder.
Go to C:\Program Files\Novell\Tomcat\lib\org\apache\catalina\util and edit the serverInfo.properties file:
Remove Apache Tomcat/7.0.23 from the line server.info=.
Remove 7.0.23.0 from the lineserver.number=.
Remove Nov 20 2011 07:36:25 from the line server.built=.
Go to C:\Program Files\Novell\Tomcat\lib and run jar -cf catalina.jar META-INF org.