Firewall basics
Allow only the ports you need (22, 80, 443).
Difficulty 2/5
Short
Plain English
Allow only the ports you need (22, 80, 443). Picture it like this: Locking every door except the front. In the apps you ship (Agentify, wedding portals, CRM), you will bump into this on almost every screen — name it clearly when you prompt your coding agent.
Analogy
Locking every door except the front.
Go deeper
Allow only the ports you need (22, 80, 443).
Common mistakes
- Letting the AI rename this concept three different ways in one PR.
- Building UI before you can say what is stored and who can change it.
AI-agent trap
Agents may invent jargon here. Ask them to explain the concept in plain English first, then map it to your schema and one real screen.
Summary
Allow only the ports you need (22, 80, 443). Locking every door except the front. Ask yourself: where does this live in the database, which function changes it, and which screen shows it?
Confidence: