Has anyone tried this? I've searched around, but I haven't found anything. It should be fairly straightforward to set up a Dockerfile that pulls from Debian 8 and loads up 3CX, so the real challenge will be setting up the nginx reverse-proxy. I'll start playing around with it, but any suggestions are greatly appreciated. If anyone has 3CX running behind an nginx reverse-proxy, I would LOVE to see your config! I'll post a docker-compose.yml file here if/when I ever get this going properly. For starters, here's my standard docker-compose.yml for nginx-proxy/letsencrypt. Note that there is no "networks" config -- it will create "nginx_default" (i put it in a folder named "nginx") that you attach other containers to behind it: Code: version: '2' services: nginx-proxy: image: jwilder/nginx-proxy container_name: nginx-proxy ports: - "80:80" - "443:443" volumes: - ./vhost.d:/etc/nginx/vhost.d - /usr/share/nginx/html - ./certs:/etc/nginx/certs:ro - ./conf.d/:/etc/nginx/conf.d - /var/run/docker.sock:/tmp/docker.sock:ro restart: always letsencrypt-nginx-proxy-companion: image: jrcs/letsencrypt-nginx-proxy-companion container_name: letsencrypt-nginx-proxy-companion volumes_from: - nginx-proxy volumes: - /var/run/docker.sock:/var/run/docker.sock:ro - ./certs:/etc/nginx/certs:rw restart: always For example, a Wordpress container connected to the proxy: Code: version: '2' services: db-wordpress: image: mysql:5.7 container_name: db-wordpress volumes: - ./db-wordpress:/var/lib/mysql environment: - MYSQL_ROOT_PASSWORD=wordpress - MYSQL_DATABASE=wordpress - MYSQL_USER=wordpress - MYSQL_PASSWORD=wordpress networks: - proxy-tier restart: always wordpress: depends_on: - db-wordpress image: wordpress container_name: wordpress volumes: - ./html:/var/www/html environment: - WORDPRESS_DB_HOST=db-wordpress:3306 - WORDPRESS_DB_PASSWORD=wordpress - WORDPRESS_DB_USER=wordpress - VIRTUAL_HOST=example.com,www.example.com - LETSENCRYPT_HOST=example.com,www.example.com - LETSENCRYPT_EMAILfirstname.lastname@example.org networks: - proxy-tier restart: always networks: proxy-tier: external: name: nginx_default There REALLY shouldn't be any reason why this won't work! Like I said, I think it is just a matter of getting a proper reverse-proxy config file set up.