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Discussion on: Connect to a Private Subnet AWS EC2 without Ingress

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Serhii Vasylenko • Edited

I suggest auditing the “AmazonSSMManagedInstanceCore” policy and think twice before using it: it provides read access to all SSM Parameters, basically exposing it to any application on the instance that assumes a role with that policy.
It’s better to use a customized policy with minimum permissions enough for Session Manager to work.