To define a personalized error page file for a virtual host you can add a line
like the following in the primary virtual host security file. Defining
a different error file, the server will look in the web
directory instead of the system one. If no personalized
files are used the server will look for the file x.html
in the system directory, where x
is the error number(for example: 404.html).
A primary security file for a virtual host is the security file that is
located in the main directory of the virtual host. If the error is not
specified then the default in the system directory will be used, if this
file doesn't exist too the error will be communicated trough the HTTP
error message.
<ERROR FILE="error404.html" ID="404" />
For more information on the error pages consult the RFC2068 document found
at www.w3c.org.