Bypassing tplogin.cn redirection to access the TP-LINK router management page via the public network

Sep 30, 2024#nginx42

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This post is translated from Chinese into English through AI.View Original

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**Solution**: Configure Nginx as a proxy and use its substitution feature to modify hardcoded domain checks in the frontend. Set up a server block to listen on port 1234, proxy requests to a specific address, and replace 'tplogin.cn' with 'your.domain.com'. Ensure the substitution applies to all file types. If the subs_filter module is unavailable, consider installing nginx-extras or compiling from source. Restart Nginx to apply changes. **Background**: Recently set up a public IP at home to expose some services to the internet.

Solution#

First, let's talk about the solution. By configuring a proxy with nginx and using its replacement feature, we can modify the hardcoded judgment logic in the front-end page.

server {
  # Exposed port
  listen 1234;

  location / {
    # Management page address
    proxy_pass http://192.168.0.1/;
    # Key logic, replace the hardcoded domain detection in the front end
    subs_filter 'tplogin.cn' 'your.domain.com';
    # Set to take effect for all file types
    subs_filter_types *;
}

If you encounter an error indicating that the subs_filter module is unavailable, you can try installing nginx-extras or compile it from source to resolve the issue.

Finally, restart the nginx service to take effect.

# sudo systemctl restart nginx
nginx -s reload

Background#

Recently, I've been tinkering with a home cloud, applied for a public IP, and exposed some services to the wide area network.

To be continued.