403 Forbidden Error From Nginx Proxy Manager

When encountering a "403 Forbidden" error in Nginx Proxy Manager, it indicates that the server or proxy is denying access to the requested resource. This issue could be due to a variety of reasons involving Nginx configuration, file permissions, or the backend service. Here's a breakdown of potential causes and solutions:

• Nginx Proxy Manager allows you to set access control rules for proxy hosts (like whitelisting or blacklisting certain IPs).
• Solution: Verify if any IP access control rules are set for the proxy host that might be blocking access. In the Proxy Host settings, check the "Access List" section and ensure that your IP is allowed access if an access list is applied.