By default, most installations of PostgreSQL use insecure connections instead of encrypted connections. This guide explains how to use a free Let's Encrypt certificate to secure connections to your PostgreSQL server. Before beginning this guide: * Deploy an Ubuntu 20.04 LTS cloud server at Vultr. * Create a fully-qualified domain name (DNS "A" record) that points to your server's IP address. Install the main PostgreSQL packages. $ sudo apt install postgresql postgresql-contrib ......