The 403 or access forbidden error message is an HTTP response code that is displayed every time the user wants to communicate with the server and the server has blocked the specific IP (in most cases in the SEO field) or users and has refused to process requests for the specific IP.
In the HTTP 403 protocol used on the W3 or World Wide Web, 403 forbidden is an HTTP status code returned by a web server that the user requests and the server does not allow. Simply put, the request has been reached on the server, but the server has refused to allow access to the page.
Some other 403 error messages returned by the server related to the request are:
• 403.1 – Execution access prohibited.
• 403.2 – Read access prohibited.
• 403.3 – Write access prohibited.
• 403.4 – SSL required.
• 403.5 – SSL 128 required.
• 403.6 – IP address rejected.
• 403.7 – Client certificate required.
• 403.8 – Access denied to the site.
• 403.9: too many users.
• 403.10 – Invalid configuration.
• 403.11 – Password change.
• 403.12 – Mapper denied access.
• 403.13 – Client certificate revoked.
• 403.14 – Directory listing denied.
• 403.15 – Client Access Licenses Exceeded.
• 403.16 – The client’s certificate is not trusted or is invalid.
• 403.17 – The client’s certificate has expired or is not yet valid.
Some other important factors causing the 403 error
• A third-party program – Your download accelerator, firewall, or antivirus is preventing you from connecting to a particular site.
• A Windows update site control, which is normally installed on your computer, may or may be missing.
• The system host file may be missing or incorrectly configured.
• The files required for Internet Explorer to function may be missing or corrupted.
• Can 403 errors be corrected?
• The answer is yes.
• The next question is how?
• Disable recently installed programs – The programs I am referring to here are recently made changes to your antivirus and / or firewall settings.
• Reset host file to defaults – If you develop websites and constantly update this file, you may have added settings that are causing your current problem. One suggestion here is to reset the host to its original settings.
• Repair your registry – Some of the problems you experience with this error may be the result of corrupted files required for Internet Explorer to function properly.
• Can the 403 error be eliminated in all situations?
• No, because in most conditions during the SEO process, the website owners prohibit us from spamming their sites, so in that case it is not possible to delete this message. However, some of the site owners may automatically remove this error after a specified period of time according to their own guidelines.