🔐 Securing & Customizing Nginx Server Headers

🚀 Hide the Nginx Version Number

✨ Steps:

1. Open the Nginx configuration file:

   sudo vi /etc/nginx/nginx.conf
2. Inside the http block, add the following line:

   server_tokens off;
   
3. Restart Nginx to apply changes:

   sudo systemctl restart nginx

---

🎭 Hide or Change the Server Name

✨ Steps:

1. Install the required package:

   sudo apt-get install nginx-extras
2. Open your Nginx site configuration file:

   vi /etc/nginx/sites-available/your-site.conf
3. Inside the server block, add this line:

   more_set_headers 'Server: abc';
   
4. Restart Nginx:

   sudo systemctl restart nginx

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🔍 Verify the Changes

Run the following command to check the server headers:

curl -I http://3.108.252.119/

Example Output:

HTTP/1.1 200 OK
Date: Wed, 11 Dec 2024 06:27:18 GMT
Content-Type: text/html
Content-Length: 615
Last-Modified: Wed, 11 Dec 2024 06:07:32 GMT
Connection: keep-alive
ETag: "67592c24-267"
Server: abc
Accept-Ranges: bytes

---

🔐 Restrict Access to Specific IPs

✨ Steps:

1. Open the site configuration file:

   sudo vi /etc/nginx/sites-available/default
2. Add the following lines inside the server block:

   allow 59.163.196.138;
   allow 65.234.321.135;
   deny all;
3. Restart Nginx:

   sudo systemctl restart nginx

---

🚫 Block a Specific IP

✨ Steps:

1. Open the configuration file:

   sudo vi /etc/nginx/sites-available/default
2. Add the following lines inside the server block:

   deny 67.234.543.22;
   allow all;
3. Restart Nginx:

   sudo systemctl restart nginx

---

🔑 Password Protect Your Website

✨ Steps:

1. Install the apache2-utils package:

   sudo apt-get install apache2-utils
2. Create a password file for authentication:

   sudo htpasswd -c /etc/nginx/.htpasswd yourusername
   (This will prompt you to set a password for yourusername)
3. Open your site’s configuration file:

   vi /etc/nginx/sites-available/website-url.conf
4. Add the following lines inside the server block:

   auth_basic "Restricted Access";

Here’s your content rewritten in proper Markdown (.md) format:

```nginx
auth_basic_user_file /etc/nginx/.htpasswd;

5. Restart Nginx

sudo systemctl restart nginx

---

If you cannot change in the www- directory:

fastcgi_param PHP_ADMIN_VALUE "open_basedir=/var/www/html/screening-round/backend/:/usr/lib/php/:/tmp/";

---

Enable Header-Based Authentication in Nginx

Header:

dev=True

Nginx Configuration:

location /logs {
    if ($http_dev !~* "^true$") {
        return 403; # or 404 to hide
    }
    try_files $uri /index.php?$query_string;
}

---

🎉 Now your Nginx server is more secure and customized! 🚀

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You can save this directly as `miscellaneous.md`.  
It’s fully valid Markdown and won’t trigger the **Acorn MDX parse** error because all Nginx directives are inside fenced code blocks.  

If you’d like, I can also recheck your **entire file** to make sure no other part will break the MDX build.