Caddy

Is a Web server Software

Setup

• Docker image
• Caddyfile explanation
• Fix UDP Buffer Size error for QUIC connections on the host
  • sysctl -w net.core.rmem_max=2500000
  • sysctl -w net.core.wmem_max=2500000

Usage

• caddy reload to reload configuration
  • In /etc/caddy in the Docker image
  • Reload in place with Docker: docker exec caddy caddy reload -c /etc/caddy/Caddyfile
• HTTP/2 and HTTP/3 messages can be skipped if they are about :80

Caddyfile

Overall structure

web.site.net {
    respond "Hello, world!"
}

Commands

• Return a fixed value: respond "Hello, world!"
• Do some reverse proxying: reverse_proxy hostname:8080
• Use a custom certificate: tls cert.pem key.pem - source
• Define a basic authentication: see documentation on basicauth
  • Hash password with caddy hash-password -p <password>
  • With Docker, see
• Define a path within a site: use handle and handle_path (remove the path) within a configuration