Common server error codes and meanings
301 - Moved permanently
The requested page has been assigned a new location permanently. This is controlled by sys admin.
302 - Moved Temporarily
The requested page has been assigned a new location temporarily. This is controlled by sys admin.
400 - Bad Request
The request made to the server could not be understood. Probably an erroneously typed URL
401 - Authorization Required
Invalid username or password was provided to the .htaccess protection. Basic Authentication is an Apache server resource for protecting access to directories. Up to 3 attempts at authentication can be made before a 401 error is produced. See .htaccess for information on how to redirect the user to your own custom error page. See Upload Pro for a script that automates the protection of Member directories.
403 - Forbidden
The server understood the request but refused to allow it. This usually means that permissions have not been set up to allow cgi script execution or to permit the to public access files contained within the requested directory. If you have root access to the server, add the following line to the server's httpd.conf file :
Options Includes ExecCGI
Or try adding it to a .htaccess file and drop in the directory you're trying to access.
This can be very confusing and can stump even the most seasoned system administrators. If the above doesn't work and you have Shell/command line access to your server, try the following :
chmod a+r /dir
The above command will grant (+) read (r) permission to all (a) users for the directory (dir) defined. To apply the same command to all directories recursively, use the -R switch, as in :
chmod -R a+r /dir
Other syntax includes:
r read permission
w write permission
x execute permission
+rwx grants read, write, execute permissions
u set permissions for user (user being the owner of the file as set by chown)
g set permissions for group
o set permissions for other or world
a set permissions for all users (user, group, other)
u+rwx grants full read, write, execute permissions to user
The /directory can be a file name, space separated list of file names, or a directory. To grant read and write permissions to the current group and current owne of the files named a.html and b.html :
chmod u+rw a.html b.html
chmod u+rw * same, except for all files in the current directory.
404 - Not Found
The most common error encountered on server for two reasons. 1) When undisguised, means the requested page no longer exists. i.e. it was deleted by the web master, or the link you typed or clicked was misspelt. And 2) This error is commonly used when a server does not know how to treat a bad request, or when the server's admins do not want you to see the bona-fide error.
500 - Internal Server Error
This is a programmer's most visited error. Produced when an error exists in the script requested. If you're a Perl programmer, see this page for a free debugging solution.
Other server returned errors
Informative Responses 1xx
100 - Continue
101 - Switching Protocols
Successful Requests 2xx
200 - OK
201 - Created
202 - Accepted
203 - Non-Authoritative Information
204 - No Content
205 - Reset Content
206 - Partial Content
Redirection Errors 3xx
300 - Multiple Choices
302 - Found
303 - See Other
304 - Not Modified (It was cached by client)
305 - Use Proxy
307 - Temporary Redirect
Client Errors 4xx
402 - Payment Required : Not currently implemented
405 - Method Not Allowed
406 - Not Acceptable
407 - Proxy Authentication Required
408 - Request Timed Out
409 - Conflict
410 - Gone
411 - Length Required
412 - Precondition Failed
413 - Request Entity Too Large
414 - Request-URI Too Long
415 - Unsuported Media Type
416 - Requested Range Not Satisfiable
417 - Expectation Failed
Server Errors 5xx
501 - Not Implemented
502 - Bad Gateway
503 - Service Unavailable
504 - Gateway timeout
505 - HTTP Version Not Supported
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