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DevOps & Infrastructure
Let's Encrypt SSL Certificates
Automate free SSL/TLS certificate provisioning and renewal with Let's Encrypt using Certbot, ACME clients, and DNS challenges.
Claude Code Codex Cursor
Overview
Let's Encrypt provides free, automated SSL/TLS certificates that have revolutionized web security. AI agents can set up Certbot or other ACME clients, configure automatic renewal, handle DNS and HTTP challenges, and integrate certificates with Nginx, Apache, or other web servers. This eliminates the need to manually manage certificates or pay for commercial CAs.
AI coding agents can generate the complete certificate setup for your server: install Certbot, run the appropriate challenge type (HTTP-01 for simple setups, DNS-01 for wildcards), configure your web server to use the certificates, and set up automatic renewal via cron or systemd timers. The agent understands the differences between standalone, webroot, and DNS challenge modes and recommends the right one for your setup.
For advanced use cases, your AI agent can configure wildcard certificates using DNS challenges with your DNS provider's API, set up certificate monitoring to alert before expiration, implement OCSP stapling for faster TLS handshakes, and troubleshoot common issues like rate limits, challenge failures, and renewal errors.
AI coding agents can generate the complete certificate setup for your server: install Certbot, run the appropriate challenge type (HTTP-01 for simple setups, DNS-01 for wildcards), configure your web server to use the certificates, and set up automatic renewal via cron or systemd timers. The agent understands the differences between standalone, webroot, and DNS challenge modes and recommends the right one for your setup.
For advanced use cases, your AI agent can configure wildcard certificates using DNS challenges with your DNS provider's API, set up certificate monitoring to alert before expiration, implement OCSP stapling for faster TLS handshakes, and troubleshoot common issues like rate limits, challenge failures, and renewal errors.
Who Is This For?
- Developers setting up HTTPS for web applications on Linux servers
- System administrators automating certificate renewal with Certbot
- DevOps engineers configuring wildcard certificates with DNS challenges
- Teams implementing SSL certificate monitoring and expiration alerts
Installation
Setup for Claude Code
Install Certbot: sudo apt install certbot python3-certbot-nginx (Ubuntu)
Claude Code runs certbot commands and configures web serversConfiguration
# Obtain certificate with Nginx plugin
sudo certbot --nginx -d example.com -d www.example.com --non-interactive --agree-tos -m admin@example.com
# Wildcard certificate with DNS challenge
sudo certbot certonly --dns-cloudflare --dns-cloudflare-credentials ~/.secrets/cloudflare.ini -d "*.example.com" -d example.com
# Test automatic renewal
sudo certbot renew --dry-runExplore AI Tools
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