403 Error: Causes, Impacts and Solutions to Fix “Forbidden”

The 403 error, also known as “Forbidden”, is one of the most common errors on the web. It occurs when the server refuses to grant access to a resource, even though that resource exists.

In this article, we’ll explore:

• What a 403 error is.
• The most common causes of this error.
• Its impact on user experience and SEO.
• Practical solutions to fix a 403 HTTP error.

Whether you’re a website administrator or a user, this guide will give you clear answers and concrete solutions.

Need help with other errors? Check out our complete guides on HTTP errors 404, 500, 502, 504, 429, 401, 400 and 410 to understand their causes, impacts and solutions.

What is a 403 HTTP error?

A 403 HTTP error means that the server understands the client’s (browser’s) request but refuses to provide access to the requested resource. Unlike a 404 error, which indicates that a page can’t be found, the 403 error informs you that access to the resource is forbidden.

How does the 403 error appear?

It can appear in different forms, depending on the server or browser:

• 403 Forbidden
• HTTP Error 403 – Forbidden
• Access denied
• You don’t have permission to access this resource

Why is it important to fix the 403 HTTP error?

Impact on user experience:

• A 403 error can frustrate your visitors, who don’t understand why access is blocked.
• It can lead to a high bounce rate, which sends a negative signal to search engines.

Impact on SEO:

• If important pages on your site return a 403 error, they risk being deindexed by Google.
• A repeated 403 error can affect your site’s credibility with search engines.

Tip: Regularly monitor 403 errors via Google Search Console to prevent them from harming your rankings.

Common Causes of a 403 HTTP Error

Incorrect file permissions:

• File or folder permissions don’t allow public access.
• Example: 600 or 700 permissions on a file or folder prevent visitors from seeing it.
• Useful resource: Discover best practices for file permissions on the official cPanel website.

Issues in the .htaccess file:

• A misconfiguration in the .htaccess file can block access to certain resources.

IP restrictions:

• Some IP addresses may be blocked intentionally or by mistake.

Missing authentication:

• Some resources require specific authentication to be accessed.

Issues related to the firewall or hosting provider:

• Some firewalls or server security configurations can block access.

WordPress plugins or themes:

• In WordPress, a conflict between plugins or a theme update can cause a 403 error.

How to Fix a 403 HTTP Error?

1. Check file permissions:

• Make sure file and folder permissions are correct:
  – Folders: 755 (read, write and execute for the owner; read and execute for others)
  – Files: 644 (read and write for the owner; read-only for others)
• How to do it?:
  • Connect to your site via FTP or use your hosting provider’s file manager.
  • Right-click on a file or folder and select “Change permissions”.
  • Apply 755 to folders and 644 to files.

If you have access to an SSH terminal, you can also use these commands:

To modify a folder:

chmod 755 mon_dossier

To modify a file:

chmod 644 mon_fichier

To apply the permissions to all files and folders:

find /chemin/vers/votre-site -type d -exec chmod 755 {} \;
find /chemin/vers/votre-site -type f -exec chmod 644 {} \;

2. Inspect the .htaccess file:

• Look for incorrect rules or unwanted restrictions.
• If you suspect a problem, temporarily rename the .htaccess file to disable its effects.
• For more information, see our article on 500 HTTP errors.
• Example of a basic .htaccess file:

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress

3. Temporarily disable WordPress plugins:

• If you’re using WordPress, disable all plugins to see whether one of them is causing the error.
• How to do it?
  • Connect via FTP and rename the wp-content/plugins folder to plugins_old.
  • If the error disappears, reactivate the plugins one by one to identify the culprit.

4. Check IP restrictions:

• If IP addresses are blocked in the .htaccess file or by a security plugin, remove or adjust the rules.
• Example of a rule in .htaccess:

Deny from 192.168.1.1

5. Contact your hosting provider:

• If none of the steps above work, contact your hosting provider’s support.
• Ask them to check the server settings or temporarily disable the firewall for testing.

6. Check the robots.txt file:

• Make sure your robots.txt file isn’t blocking essential resources.
• Example of a correct robots.txt file:

User-agent: *
Disallow:

Best Practices to Prevent 403 HTTP Errors

1. Make regular backups:
   – Back up your files and configurations before any change.
2. Test changes before deployment:
   – Always test .htaccess rules or new plugins in a staging environment.
3. Monitor permissions:
   – After any file transfer via FTP, check that the permissions are set correctly.
4. Use a reliable security plugin:
   – Install plugins like Wordfence to manage IP restrictions and strengthen security.
5. Control user access:
   – Limit user roles and permissions in WordPress to avoid conflicts.
6. Use monitoring tools:
   – Google Search Console: Identify the 403 HTTP errors reported by Google.
   – ManageWP: Monitor the performance and errors of your WordPress site.

Recommended Tools:

• Google Search Console: To identify 403 HTTP errors and the affected pages.
• FTP Clients (FileZilla): To adjust file permissions.
• WordPress Plugins:
  – Wordfence for security.
  – WP-Optimize to clean up unnecessary files.

Conclusion

The 403 HTTP error may seem complex, but with a structured approach, you can quickly identify and fix the underlying cause. By following the steps and best practices described in this article, you ensure smooth access to your site’s resources while improving user experience and SEO.

To prevent this error from happening again, follow the best practices mentioned and regularly monitor errors via Google Search Console. If you want to learn more about other HTTP errors, explore my articles on errors 404, 500, 403, 502, 503, 504, 429, 401, 400 and 410 for detailed solutions!