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SSL Certificate Management

Configure and manage SSL/TLS certificates.

Let's Encrypt with Certbot​

Install​

sudo apt install certbot python3-certbot-nginx

Obtain Certificate​

sudo certbot --nginx -d gauzy.example.com -d api.gauzy.example.com

Auto-Renewal​

Certbot installs a cron job automatically:

# Verify auto-renewal
sudo certbot renew --dry-run

Nginx SSL Configuration​

server {
    listen 443 ssl http2;
    server_name api.gauzy.example.com;

    ssl_certificate /etc/letsencrypt/live/api.gauzy.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/api.gauzy.example.com/privkey.pem;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256;
    ssl_prefer_server_ciphers off;

    # HSTS
    add_header Strict-Transport-Security "max-age=63072000" always;

    location / {
        proxy_pass http://localhost:3000;
    }
}

Certificate Monitoring​

ToolDescription
Certbot TimerAuto-renew via systemd/cron
SSL LabsSecurity grade check
UptimeRobotExpiry monitoring
Custom Prometheusssl_cert_expires_in_days

Wildcard Certificates​

sudo certbot certonly --dns-cloudflare \
  -d "*.gauzy.example.com" \
  --dns-cloudflare-credentials ~/.secrets/cloudflare.ini