How to resolve issues with ineffective configuration of nginx reverse proxy?

To troubleshoot and resolve the issue of ineffective nginx reverse proxy configuration, follow the steps below:

1. Check if the nginx configuration file is correct: ensure that the reverse proxy configuration in the file, including the proxy address, port, protocol, and other information, is correctly filled out.
2. Check if Nginx has started successfully: Use the command ‘nginx -t’ to check if the syntax of the Nginx configuration file is correct, then use the command ‘nginx’ to start the Nginx service, and use the command ‘netstat -tlnp’ to check if Nginx is listening on the correct ports.
3. Check the firewall configuration: If a firewall is being used, make sure the configuration allows communication on the ports used by the nginx service.
4. Check the target server for availability: ensure that the proxy’s target server is functioning properly and can be accessed in the usual manner.
5. Check if the proxy address is working: Use tools like curl or a browser to test if the proxy address is functioning properly, and confirm if you can successfully access the target server.
6. Check the nginx log: review the nginx error log, usually located at /var/log/nginx/error.log, to see if there are any relevant error messages, and proceed with further inspection and handling based on the error messages.

If the problem still cannot be resolved after following the above steps, you may consider reinstalling or upgrading nginx, or referring to the official documentation or community forums for solutions.