How to get Docker Containers to talk to each other on CIS-hardened Ubuntu 18.04

TL/DR: iptables rules are dropping the packets! The setup We’re preparing to go through an ISO 27001 security audit at work.One requirement is to ensure that all operating systems are locked down. We chose to follow the Center for Internet Security (CIS) Level 1 benchmark for Ubuntu. Conveniently, Microsoft Azure has pre-configured CIS images, but […]

Docker 101

This isn’t a “What is Docker?” post; you can find those everywhere, written by people who understand it, and can explain it, much better than I. This is a quick & dirty “get-it-running” primer. A Docker image consists of a “base layer” (usually a slimmed down version of Linux, or Windows) and software additions/modifications layered […]