How to Fix 403 Forbidden Error: Meaning and Proven Solutions

You've probably come across a 403 error at some point, whether you're working with servers, sending API requests, deploying code, or just a regular user. Even though the screen simply displays “Forbidden” there can actually be many reasons behind it. Sometimes it's due to a broken .htaccess, and other times it's because of a security policy. In reality, this problem almost never occurs out of nowhere. It’s a symptom of issues with configuration or access permissions that you need to find and fix.

What is a 403 Error?

A 403 error occurs when the server understands the request but refuses to authorize it. It’s important not to confuse this issue with a 401 case, where re-entering your password might help. With a 403 HTTP error, re-authenticating is pointless, and you don’t even have the permissions to do so. According to RFC 7231, a server that wishes to disclose the reason for rejecting a request may describe it in the response body, if one is present. For security reasons, developers often return a 403 response to avoid revealing the logic behind access filters or to hide the existence of private endpoints from scans. Often, this blocking occurs at the WAF level before the request even reaches the application logic.

403 Forbidden Error Meaning: Authorization Logic 

To avoid getting stuck, you need to understand that this problem is focused solely on authorization. Authentication is meaningless here. If a developer accesses the API but the account lacks GET request permissions to the database, the server will return a 403 error. We can describe this as a security mechanism. It clearly shows us that even authenticated users cannot make changes to the system.

Why Am I Getting a 403 Forbidden Error?

As we've already figured out, this issue means that access to the content is restricted. Often, incorrect gateway or firewall settings lead to a proxy error, causing requests to be dropped before they reach the server. However, these are rather local issues, and the most common causes of access denial are the following factors.

Invalid Index File Name

This is the file responsible for displaying the website's home page. Its location can be on a server or a hosting account, and it must have a valid extension, such as .htm, .php, .shtml, etc. If the extension is incorrect, the user will see an error message instead of the website's home page.

Invalid Access Rights

It is not uncommon for an administrator to set the wrong access permissions for certain folders. For example, they might set read permissions for a folder only for themselves. And if a user tries to open a page that retrieves data from that folder, they again get an erroneous message.

Restriction in .htaccess

It is a file used to manage the web server. If an administrator adds a directive to it that denies access to the file, users cannot open it. Incorrect syntax or forgotten rules (Order Deny, Allow) often turn security measures into a problem.

Migrating a Website to a New Hosting Provider

When a website moves to another hosting provider or individual files move to a different server location, the DNS cache updates. Until the cache has updated, the website will be unavailable.

Plugins or Extensions

Some plugins or extensions add security measures, such as request filtering or blocking suspicious activity. With incorrect configuration, a plugin may restrict access even for legitimate users or API requests.

How to Fix 403 Forbidden Error?

It may be intentional for you to see a 403 error. Let’s say the site administrator has deliberately restricted access to the site. In that case, you can try accessing the site via a VPN or buy cheap proxy. However, this will only work if access is blocked specifically for your IP address. If you're absolutely certain there shouldn't be any issues, then it's most likely that something has gone wrong with the website's hosting service. This means you need access to it to fix the problem. 

Check Access Permissions

Every folder and file on the hosting server has permissions, which determine who can do what with them. There are three types:

• Read - view a folder.

• Write - make changes, create, or delete data in a folder.

• Execute - run scripts and commands.

Three categories of users may have these rights:

• Owner - usually the creator.

• Group - people with special rights.

• World - everyone else, such as website visitors.

Here are the standard permissions that should work for everything:

• Folders - 755 or 750;

• Files - 644 or 640.

Exception - wp-config.php in WordPress: 440 or 400.

Check the Folder Owner

Another reason for a 403 error message is an incorrect file owner. The settings may be correct, but the files belong to a different user that the web server doesn't recognize. 

VPS users may encounter this problem, but it doesn't occur on shared hosting. To fix this, set the web server as the owner of the folders. To do this, connect via SSH to the terminal and use the following command:

chown user:group /path/to/file

You must specify the user under whose account the server is running. This is usually apache or httpd, although it generally depends on the system.

Check .htaccess

Problems here arise when multiple .htaccess directives are written or conflict with each other. Another possible cause is the use of specific denial directives containing the phrases “Deny from…”, “Require IP …”, or “R=403”.

If you’ve recently made changes to .htaccess, you’ll likely find the line responsible for the error. If not, the issue might be due to a plugin installation. 

An easy way to figure out what’s going on is to rename the file, which should stop the instructions in it from working. If the 403 error access denied disappears after that, the problem lies in one of the directives. You’ll then have to manually figure out which one. 

Check the .index in the Website's Root Folder

The index is loaded when the site opens. Its name gets set in the server settings.

If there is no index with the specified name in the folder, the server will attempt to display a list of files. This is usually prohibited, which is why a 403 client error appears.

Verify that the index name matches the settings (for example, index.html and index.php). If necessary, add the appropriate value to the configuration.

Configuration files are usually located:

• The main configuration is httpd.conf in the /etc/httpd/conf/ directory or apache.conf in the /etc/apache2/conf/ directory (depending on the distribution).

• Additional config stuff in the /etc/httpd/conf.d/, /etc/apache2/conf.d/, /etc/apache2/sites-available/, or /etc/apache2/sites-enabled/.

Check the ModSecurity Settings

ModSecurity protects your website from external threats. It works by blocking requests with an HTTP 403 Forbidden status code if it deems them malicious. Sometimes it triggers when it shouldn’t.

The solution is to disable the rule, but this can only be done on a VPS or a dedicated server. On shared hosting, the firewall is configured by the provider, and regular users don't have access to it. In this case, contact your provider's support and ask them to disable the specific rule for your website.

You can determine whether the fault lies with the firewall by checking the logs. On a VPS or dedicated server, you can find them by default at the following paths.

• For Apache - /usr/local/apache/logs/modsec_audit.log.

• For Nginx - /var/log/modsec_audit.log.

403 Error Sum Up

A 403 error is a good reason to review your access permissions. By double-checking folder and file permissions, the correctness of your .htaccess, and the ModSecurity rules and filters, you can resolve most issues. Don’t forget to check the browser cache or CDN, which can sometimes prevent you from seeing the updated access settings. Sometimes the issue stems from a proxy chain: if the request doesn’t reach the target server, you’ll get a classic  proxy error 403. In this case, check the configuration of the intermediate gateway or load balancer. A step-by-step check will quickly bring your website or API back online.