What is JIT VM access in Azure Security Center?
Experience Level: Senior
Tags: Azure CloudAzure Security Center
Answer
Just-in-time (JIT) VM access is a feature of Azure Security Center that allows you to lock down the inbound traffic to your VMs reducing exposure to attacks while providing easy access to connect to VMs when needed.
Threat actors actively hunt accessible machines with open management ports, like RDP or SSH. All of your virtual machines are potential targets for an attack. When a VM is successfully compromised, it's used as the entry point to attack further resources within your environment.
As with all cybersecurity prevention techniques, your goal should be to reduce the attack surface. In this case, that means having fewer open ports, especially management ports.
Your legitimate users also use these ports, so it's not practical to keep them closed.
To solve this dilemma, Azure Security Center offers JIT.
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