Metin2-Help confirms that you control the domain by reading a text file, a DNS TXT record or, optionally, a meta tag. Ownership verification does not approve or publish the server.
The file name is always metin2-help-verify.txt. Its content is your server code followed by a newline.
The optional meta-tag method looks in the homepage for exactly <meta name="metin2-help-verify" content="THE-CODE">. It does not replace the file or DNS methods.
If the file exists on the host but the URL returns 404, it was uploaded somewhere other than the domain document root.
Apache and custom PHP
The document root is usually public_html, www or htdocs. Create .well-known there and upload the file. A RewriteRule that sends every request to index.php must exclude /.well-known/. There is no need to turn off authentication or the firewall for the rest of the site.
LiteSpeed
The document root is shown in the virtual host configuration. .htaccess is read, but a different vhost on the same account does not see the file. Test the public URL, not the path inside the file manager.
Laravel
The real document root is the project public directory, not the application root. The file belongs in public/.well-known/metin2-help-verify.txt. The rules in public/.htaccess must not send this path to the front controller.
WordPress
The document root is the folder that contains wp-config.php and index.php. Upload the file into .well-known there. If a security plugin blocks unknown files, allow only this name. Do not disable security for the whole site.
Symfony
The file belongs in the project public directory. If every request reaches index.php, add an exception for /.well-known/ before the rewrite.
CodeIgniter
On CodeIgniter 4 the document root is public/. Older versions may use the project root. Put the file in the document root and exclude the path from the rule that rewrites to index.php.
Nginx
Nginx does not read .htaccess. The file must exist under the root directive, and the location must not send /.well-known/ into the application. A configuration that serves existing files directly is try_files $uri $uri/ /index.php?$query_string;
Cloudflare
A 403 produced by a WAF rule is different from a 404 produced by the origin. Compare the response with Cloudflare bypassed only for that URL, or check the cf-ray header and the WAF event. Do not disable protection for the whole domain; add a narrow exception for the verification path.