you can customize the response contents for error codes by defining error-page mappings in your web.xml, e.g.:
<error-page>
<error-code>404</error-code>
<location>/404handler.jsp</location>
</error-page>
if all you want to do is avoid any server product specific info in the response, then define a system property named "product.name" and set its value to the empty string.
jan
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