Error & Status Codes

• HTTP status codes at a glance: what do 301, 403, 404, 500 and co. mean? Every response from a web server carries a three-digit status code. Here you will find the most important codes at a glance - with links to detailed guides on causes and solutions.
• HTTP status code 301 Moved Permanently: meaning and use Status code 301 stands for a permanent redirect. Find out when to use it, how to set it up with .htaccess and what to keep in mind for your ranking.
• HTTP status code 401 Unauthorized: causes and solutions Status code 401 means that the requested page requires authentication. Find out the most common causes and how to fix the error as a visitor or site operator.
• HTTP status code 403 Forbidden: causes and solutions Status code 403 means that the server refuses access to a page. Find out the most common causes and how to fix the error as a visitor or site operator.
• HTTP status code 404 Not Found: causes and solutions Status code 404 means that the requested page was not found. Find out the most common causes and how to find and fix 404 errors on your website.
• HTTP status code 410 Gone: removing pages permanently Status code 410 states that a page has been removed deliberately and permanently. Find out when to use it and how to set it up.
• HTTP status code 429 Too Many Requests: causes and solutions Status code 429 means that too many requests were made in a short time. Find out where the limit comes from and how to deal with it.
• HTTP status code 500 Internal Server Error: causes and solutions What does the 500 Internal Server Error mean? HTTP status code 500 (Internal Server Error) is a general error message from the web server. It indicates that an unexpected problem has occurred whilst processing a request…
• HTTP status code 502 Bad Gateway: causes and solutions Status code 502 means that a server acting as an intermediary received an invalid response from the actual application server. Find out the causes and solutions.
• HTTP status code 503 Service Unavailable: causes and solutions Status code 503 means that a website is temporarily unavailable - for example due to maintenance or overload. Find out the causes and solutions.
• HTTP status code 504 Gateway Timeout: causes and solutions Status code 504 means that a server waited too long for the application server's response. Find out how to identify and speed up slow processes.

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