Managing secure access and permissions across environments can quickly become a tedious engineering headache. Understanding the exact flow of your SSH connection is essential for keeping systems secure without losing visibility.
Here is how SSH authentication functions under the hood:
The problem: SSH connections can feel like a black box when dealing with certificate provisioning, trust, and multi-factor authentication.
The fix: Standardize access using an SSH proxy, CA trust validation, certificate decoding, and structured permission extensions.
Why it matters: You get clear insight into your access checks, permissions, and final connection hops to keep your infrastructure secure.
Check out the full technical write-up to see how the entire SSH authentication flow works step by step:
How SSH authentication works on Upsun - Upsun Developer
Decode the SSH certificate the Upsun CLI provisions for you, then follow it through the SSH proxy: CA trust, revocation, access documents, and MFA.
developer.upsun.com
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