How to solve the problem of inaccessibility after php reverse proxy

Unable to access normally after using reverse proxy, it may be caused by configuration or network problems. The solutions are: 1. Check whether the proxy server configuration is correct; 2. Ensure that there is a gap between the reverse proxy server and the target server. The network connection is normal; 3. Ensure that the network configuration of the target server is correct; 4. Perform log analysis; 5. Check the port and IP address binding between the reverse proxy server and the target server; 6. Correctly configure the SSL certificate; 7. Use Check with debugging tools; 8. Restart the reverse proxy server and target server.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

If you cannot access normally after using a reverse proxy, it may be caused by configuration or network problems. Here are some solutions and troubleshooting steps:

1. Check the proxy server configuration: Confirm whether the configuration of the reverse proxy server (such as Nginx, Apache, etc.) is correct, and ensure that the proxy rules are set correctly and target server address.

2. Confirm network connection: Make sure the network connection between the reverse proxy server and the target server is normal. You can try to directly access the target server through other methods to confirm whether the network is reachable.

3. Check the target server configuration: Make sure the target server's network configuration is correct, such as firewall, router, etc., to allow requests from the reverse proxy server.

4. Log analysis: Check the access logs of the reverse proxy server and the target server to check whether there are any error messages or warnings. Conduct troubleshooting and problem location based on the information in the logs.

5. Port and address binding: Check the port and IP address binding of the reverse proxy server and the target server to ensure that the request can be correctly routed to the target server.

6. SSL Certificate Configuration: If HTTPS is used, ensure that the SSL certificate is configured correctly on the reverse proxy server and that the certificate has not expired or has other issues.

7. Debugging tools: Use tools such as ping, traceroute, telnet, etc. to test network connectivity, and HTTP debugging tools such as curl, Postman, etc. to examine the details of requests and responses.

8. Restart the service: Sometimes, simply restarting the reverse proxy server and target server may solve the problem.

If the above steps do not resolve the issue, you can provide specific error and configuration information to the backend development team or server administrator so that they can perform more in-depth troubleshooting and repair.

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