Explaining in the language the other person already knows

The organization’s network and security staff knew physical firewall policies well, but AWS security groups (virtual firewalls in front of servers) were new to them.

I documented security group policies in HTML, using the same structure as the existing physical firewall policy: source, destination, port, allow or deny, and reason. The document also explains one key difference. Security groups are stateful, so response traffic is allowed automatically.

I also wrote an operations guide for new staff, covering how to access AWS, which resources to check in the console, and how to use the Python tools.

New staff could start work right away by connecting AWS to what they already knew, without studying AWS concepts from scratch.