ARCHIVE / What are custom 404 pages?

When someone experiences a 404 error, the default behavior of a web server is to display a standard error message page indicating that the requested resource could not be found.  However, because 404 errors are relatively common, it often helps to have a nicer page that maintains the look and feel of the web site when 404 errors occur.  Such pages are generally referred to as custom 404 pages and are defined by a configuration setting appropriate to the web server software being used.  One important thing to consider is that a custom 404 error page must never attempt to rely on a resource on the same web server which does not or may not exist at some point in the future.  If a custom 404 error page was to do so, accessing the custom page would itself generate a custom 404 error response and result in an infinite loop. 

last updated 2008.01.06


What are 404 errors?



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