Install SSL Let's Encrypt on Ubuntu - nginx web server

 1. Install certbot and nginx plugin

    - sudo apt install certbot python3-certbot-nginx -y

2. confirm your web before install SSL

    - sudo nano /etc/nginx/sites-available/test.com

3. Check syntax errors

    - sudo nginx -t

4. Reload nginx

    - sudo systemctl reload nginx

5. Check firewal, if active allow https

    - sudo ufw status
    - sudo ufw allow 'Nginx Full'
    - sudo ufw delete allow 'Nginx HTTP

6. Obtaining an SSL Certificate

    - sudo certbot --nginx -d test.com -d www.test.com

7. verify auto renewal

    - sudo systemctl status certbot.timer

8. Test renewal proccess

    - sudo certbot renew --dry-run

DONE

NOTE: - First, pointing yourdomain. example: www.test.com test.com to public ip address
             - For another domain, follow just step 6

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Nginx Reverse Proxy on Ubuntu

 1. update & upgrade os

    - sudo apt update && apt upgrade -y

2. Install nginx

    - sudo apt install nginx -y

3. Allow firewall if enable

    - sudo ufw allow 'Nginx HTTP'

4. Check status nginx

    - systemctl status nginx

5. Config server block for your domain

    - sudo nano /etc/nginx/sites-available/test.com

server {
        listen 80;
        listen [::]:80;

        server_name test.com www.test.com;
 
        location / {
        include proxy_params;
        proxy_pass http://192.168.0.100; 

         }
}

6. Enable configuration

    - sudo ln -s /etc/nginx/sites-available/test.com /etc/nginx/sites-enabled/

7. Check syntax errors

    - sudo nginx -t

8. If no problem, restart nginx

    - sudo systemctl restart nginx

DONE

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