'example.com', 'subdomain' => 'www.example.com', 'email' => 'name@example.com', ]; if (file_exists($jsonFile)) { $raw = file_get_contents($jsonFile); $data = json_decode($raw, true); if (!is_array($data)) $data = $defaults; } else { $data = $defaults; } ?>
" /> " /> " required />
By checking this you authorise the server operator to run Certbot and modify nginx configuration for the supplied domain(s).
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Why ports 80 and 443 are required 
- Port 80 (HTTP) is used by Certbot for the HTTP-01 challenge: Let's Encrypt connects over HTTP to verify you control the domain.
- Port 443 (HTTPS) is required to serve TLS traffic after the certificate is issued. Nginx must accept HTTPS on port 443 so browsers and streaming clients can connect securely.


Ensure both ports are reachable from the public internet and forwarded to this server's IP. If you use a firewall, add rules to allow inbound TCP 80 and 443.