The door stays locked until the exact moment you need it — then it opens, fast, without leaving it ajar. That’s the core of Ingress Resources Just-In-Time Access. It’s simple in principle, hard in execution, and critical for security at scale.
Ingress resources control how traffic enters your systems. In Kubernetes, ingress rules map external requests to internal services. Just-In-Time (JIT) access is the practice of granting permissions exactly when they are needed, and revoking them immediately after use. Combine them, and you get a controlled gate that appears only when required, then vanishes, reducing the attack surface to near zero.
Static ingress policies leave doors open 24/7. They rely on constant firewall or gateway rules that an attacker can probe repeatedly. JIT ingress replaces static exposure with on-demand rules that expire automatically. This means ingress endpoints exist only for the duration of authorized tasks — a build deploy, a system check, an emergency fix — and disappear when complete.