Information on Various HTTP Error Codes

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Information on Various HTTP Error Codes
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Table of Contents

• Introduction
• Introduction (Continued)
• 4xx Errors
• 400 Bad Request, 401 Unauthorized, 403 Forbidden
• 404 Not Found
• 5xx Errors

• 500 Internal Serve Error
• 501 Not Implemented, 502 Bad Gateway
• 503 Service Unavailable
• 504 Gateway Timeout, 505 HTTP Version Not
  Supported
• 506 Variant Also Negotiates, 507 Insufficient
  Storage
• 509 Bandwidth Limit Exceeded, 510 Not Extended

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Introduction

• HTTP is the abbreviation for Hypertext Transfer
  Protocol, which is an application layer protocol
  and servers as data communications foundation on
  the Internet.
• To digress, the Internet is replete with websites
  which are made accessible to us through the
  service of web hosting provided by web hosting
  companies. The most reliable hosting services are
  often referred to as the Best Windows Hosting,
  the Best Cloud Hosting, the Best Website
  Hosting, etc.

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Introduction (Continued)

• The status of a URL is described by HTTP codes
  during any visitors attempts to access it. Error
  messages are included in HTTP codes. These error
  messages describe the issues that are encountered
  by visitors. Such error codes are 3-digit
  numbers. Described below are the 5 classes of
  HTTP codes, which have been divided into
  categories, based on the 1st digit.
• First digit as 1, 2, or 3 A fully functional
  request is represented by it.
• First digit as 4 Represents a client-side
  error. The commonest error codes range from 400
  to 404.
• First digit as 5 An error on the server side is
  represented by it. The commonest error codes
  range from 500 to 510.
• The various errors are described next.

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4xx Errors

• These errors are caused by certain problems with
  the request of the client, such as the browser.
  These frequently indicate some issue on the
  website. An example is receiving a 404 error when
  a faulty link on the home page is clicked by
  visitors.
• It is recommended that such errors be monitored
  and their causes be investigated. Since this
  error is found very often, it is advised that the
  error page be customized on the Error Pages
  interface in cPanel.
• cPanel gtgt Home gtgt Advanced
  gtgt Error Pages

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400 Bad Request, 401 Unauthorized, 403
Forbidden

• 400 Bad Request It indicates that there is an
  incorrect syntax in the request of the user.
• 401 Unauthorized It indicates that
  authentication, which involves a username and
  password, is required by the requested file.
• 403 Forbidden It indicates that the requested
  file will not be accessed by the visitor as the
  server wont allow it. The permission settings of
  the file need to be checked when such an error
  code is received by the visitor. It can be
  confirmed in the Indexes interface in cPanel that
  whether the file is being protected by the
  system.
• cPanel gtgt Home gtgt Advanced gtgt Indexes

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404 Not Found

• The 404 Not Found, 404 Error, or File Not Found
  indicate an error message. This is an HTTP
  standard response code. It lets us know that the
  browser successfully communicated with a server
  but the server failed to find what had been
  requested. This error might indicate the
  situation where a server does not want to
  disclose if it has the information that has been
  requested. This error usually appears when a URL
  is mistyped by a visitor.
• A 404 Not Found web page will be typically
  generated by the web server when attempts are
  made by a user to follow a link that is broken or
  dead. This results in the 404-error turning out
  to be the most recognizable error on the
  Internet.

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1-800-123 -8156

• Whoa! Thats a big number, arent you
  proud?

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5xx Errors

• A 5xx error usually occurs when an apparently
  valid request of a visitor cannot be fulfilled by
  the server. The system administrator needs to be
  contacted for resolving such an issue.
• Often an HTTP request is handled by a chain of
  servers. This needs to be considered as the
  returned error might come from a web server that
  is different than yours.

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500 Internal Serve Error

• It indicates that something unexpected occurred
  with the server. This is a multipurpose error and
  appears when the server is unable to collect any
  specific information about the issue. This error
  is usually encountered when an application
  request cannot be fulfilled by the server due to
  an application that is misconfigured.
• The system administrator needs to be contacted
  for the resolution of the issue.

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501 Not Implemented, 502 Bad Gateway

• 501 Not Implemented This error indicates that
  the server does not support the HTTP method
  chosen by the client. This error rarely happens
  but when it does, it is usually encountered due
  to the server being out of date. The system
  administrator needs to be contacted for the
  resolution of such an issue.
• 502 Bad Gateway The 502 Bad Gateway error is
  caused by such proxy servers that are not
  properly configured. Additionally, this error can
  be encountered due to poor IP communication
  between backend computers, as well as overloading
  of the ISP (Internet Service Provider) of the
  client. It can be caused by the improper
  functioning of a firewall. The first step for
  resolving this issue involves clearing the cache
  of the client. This action causes the use of
  another proxy for resolving the content of the
  web server.

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503 Service Unavailable

• The 503 Service Unavailable error indicates that
  a temporary overload has rendered the server
  unable to handle requests. This error can also
  result from the server being temporarily closed
  for causes, such as maintenance. It is indicated
  by this error that the unavailability of the
  server is temporary. Other errors can be received
  in place of the 503 error. The system
  administrator should be contacted for the
  resolution of this issue.

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504 Gateway Timeout, 505 HTTP Version Not
Supported

• 504 Gateway Timeout This error indicates that a
  timely response was not received by the server
  from another server. This error happens due to
  the slow communication between upstream servers.
  The system administrator needs be contacted for
  the resolution of this issue.
• 505 HTTP Version Not Supported This error lets
  us know that the HTTP protocol specified by the
  client computer is not being supported by the
  server. When the client computer is not able to
  correctly specify the protocol then this error
  appears. Having a current installation of cPanel
  WHM ensures that this error is averted.

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506 Variant Also Negotiates, 507 Insufficient
Storage

• 506 Variant Also Negotiates This error is
  encountered when the server is not configured
  properly. This issue can be resolved by the
  system administrator.
• 507 Insufficient Storage This error indicates
  that the server has run out of free memory. The
  cause of this error is the inability of a
  requested application to allocate the required
  system resources, in order to function. The
  system administrator should be contacted for the
  resolution of this issue.

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509 Bandwidth Limit Exceeded, 510 Not
Extended

• 509 Bandwidth Limit Exceeded It is indicated by
  this error that the server has reached the
  bandwidth limit imposed by the system
  administration. The resolution of this issue
  involves waiting for the limit to reset in the
  following cycle. Alternatively, the system
  administrator needs to be contacted for the
  resolution of this issue.
• 510 Not Extended This error indicates that an
  extension attached to the HTTP request is not
  supported by the web server. The system
  administrator should be contacted for this
  issues resolution.

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