Pil.net - Explanation of some of the errors found on the WWW

Explanations of some of the errors found
while cruising the WWW


Error 401 - Authorization Required

This means that a site or URL that you have requested has been restricted by the person putting the page(s) up. There are several ways of restricting access to a website/pages. They may be protected by passwords or by local network access restrictions, such as only allowing certain IP addresses access to that particular piece of information.


Error 403 - Forbidden

This is a generic error message that is sent by the webserver when you attempt to access a file or directory that has been configured to be used, but not in the manner you are attempting to. For example, the webserver may have a directory called /images, and the images can be accessed by knowing the name of the file in it, http://www.xxx.com/images/bigpicture.jpg, which is fine, but http://www.xxx.com/images/ is forbidden because it would generate a directory listing.


Error 404 - File Not Found

This error means just what it says, that the file you requested cannot be found. It does tell you, however that the host server is still active. The MOST common reasons that this error is sent are,



Error 500 - Server Error

This error is a severe one for the owner or webmaster of the host machine. This error is returned when the server itself cannot figure out what to do, or is not configured properly.


Error 501 - Not Implimented

This error is generated when a web page (HTML) is experiencing problems. Generally, it is caused by improper use of forms or other HTML functions that are used in a haphazard manner. The owner/webmaster of the web pages in question are responsible for fixing this problem.


Unable to Connect to ...

This error is generated by your web browser. It usually means there is a network problem somewhere between you and the remote host. Try accessing another site to confirm your machine is working.


Unable to Connect to ..... Server does not have a DNS entry

This error is also generated by your web browser, and means,

Valid HTML 4.0!!!