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July 10, 2021 08:20 am GMT

Most Common Website Errors

500

Internal Server Error

This is general purpose error and can occur whenever an internal probem is encountered by a web server. More often that not, error 500 occurs when the web server is overloaded.

401

Unauthorised

This error message will appear usually after a user has attempted to access a site they were unauthorised to access or after a failed login attempt.

400

Bad Request

If your request is corrupted you will see this error message appear. It means that something has gone wrong with your web browser in relation to your request. Usually, this means the data set by the browser does not cofirm to the rules of the http protocol.

403

Forbidden

If there is an attempt to access a forbidden directory on a website you will see the error message which means there is no login opportunity on the page. The most common reason a user will see this error message is if the website does not permit users to browse the site's file directory structure or the specific file.

404

Not Found

If user attempts to access a non existent web page, a 404 error message will appear. This message also appear when a file is very large or service running too slow.

501

Not Implemented

This message means that the browser does not support the requested feature.

502

Service Temporarily Overloaded

You will see a 502 error when your server is congested - a problem tha usualle resolves itself when web traffice decreases.

503

Service Unavailabe

Users will see a 503 message if the site they are attempting to reach is busy, or if the server is down.

Connection Refused by Host

This error message, like 404 erro, usually means that the user does not have authorisation to access the site or that an attempted login failed, usually because the password used was not correct.

File Contains no Data

users will see a file contains no data error when a page is present, but nothin shows up. This can be caused by bad table formatting or stripped header information.

failed DNS Look-Up

when a website's URL cannot be translated, a failed dns lookup error usually appears. This error usually appears on commercial sites due to overload

408

Request Time out

You will see the error message when the server does not recieve the full request from the user within the set timeframe it has allocated to wait. Repeat 408s will occur if either the server or the user's system is experiening heavy workload, or the temperory internet surge which slows down the message being deivered to the server.

Cheat Sheet

1XX Codes - Informational statuses.
2XX Codes - Status after successfull action.
3XX Codes - Status showing a redirection.
4XX Codes - Status showing a client side error
5XX Codes - Status showing a Server side error

Original Link: https://dev.to/ajoalex/most-common-website-errors-56g2

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