4.1. Advanced Compute Security

💡 First Principle: Compute resources are where your code runs—and where attackers want to run theirs. Securing compute means minimizing the attack surface before deployment and detecting malicious behavior during operation.

Think of virtual machines like houses in a neighborhood. Each house needs locks on its doors (endpoint protection), but you also don't want to advertise your address to burglars (public IP exposure). Azure Bastion and JIT VM Access work like a gated community: legitimate visitors can enter through a controlled checkpoint, but there's no direct path from the street to your front door.

What breaks without compute security? Open management ports become entry points for brute force attacks. A VM with RDP exposed to the internet will face thousands of login attempts per hour—it's not a question of "if" but "when" credentials are compromised. Unencrypted disks mean a physical security breach at a datacenter could expose your data. Container registries without authentication let anyone pull and analyze your application images.

Consider the attack chain: An attacker finds an exposed RDP port, brute-forces weak credentials, installs cryptomining software, and uses the compromised VM to move laterally through your network. Every control in this section—Bastion, JIT, disk encryption, container security—interrupts a step in this chain.