Also, series F but they’re only deploying on one server? Try scaling that to a real deployment (200+ servers) with millions of requests going through and see how well that goes.
And also no way their process passes ISO/SOC 2/PCI certifications. CI/CD isn’t just “make do things”, it’s also the process, the logs, all the checks done, mandatory peer reviews. You can’t just deploy without the audit logs of who pushed what when and who approved it.
With Docker, the internal network is just a bridge interface. The reason most firewall rules don’t apply is a combination of:
The only thing that should be affected by the host firewall is the proxy service Docker uses to listen on a port on the host and send it to the container.
When using Docker, each container acts like an independent machine, and your host gets configured to act as a router. You can firewall Docker containers, the rules just need to be in the right place to work.