SSL Certificate

What is SSL?

SSL certificates encrypt communication between browsers and your server, enabling HTTPS. Essential for security, SEO, and user trust.

Free Certificates with Certbot

sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d example.com -d www.example.com

Auto-Renewal

sudo certbot renew --dry-run
sudo systemctl status certbot.timer

Wildcard Certificate

sudo certbot certonly --manual --preferred-challenges dns -d "*.example.com" -d example.com

Verify

sudo certbot certificates
openssl s_client -connect example.com:443 2>/dev/null | openssl x509 -noout -dates