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HTTP codes describe the status of a URL when a
visitor attempts to access it. HTTP codes include
error messages that describe the problems that
visitors encounter. The codes are three-digit
numbers.
Five classes of HTTP codes, divided into categories by
the first digit, exist:
A first digit of 1, 2, or 3 represents a fully
functional request.
A first digit of 4 represents a client-side error.
The most common codes span 400 to 404.
A first digit of 5 represents a server-side error.
The most common codes span 500 to 510.
These errors are technically the result of a problem
with the client's (for example, the browser's) request,
but they often point to a problem on a website. For
example, if a faulty link exists on your home page,
and visitors click it, they receive a 404 error.
For this reason, we strongly suggest that you
monitor these errors and investigate their causes.
Because visitors see these errors the most often, we
suggest that you customize these error pages in
cPanel's Error Pages interface (Home >> Advanced >>
Error Pages).
The user's request contains an incorrect syntax.
The requested file requires authentication (a
username and password).
The server will not allow the visitor to access the
requested file. If a visitor receives this code in error,
check the file's permission settings. You can also
confirm whether the system protects the file in
cPanel's Index Manager interface (Home >>
Advanced >> Index Manager).
The server did not find a visitor's requested file. This
error commonly occurs when a visitor mistypes a
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