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Amazon Machine Images now support Instance Metadata Service Version 2 by default


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You can now set an EC2 Amazon Machine Image (AMI) to use Instance Metadata Service Version 2 (IMDSv2) by default. IMDSv2 is an enhancement to instance metadata access that requires session-oriented requests to add defense in depth against unauthorized metadata access. IMDSv2 requires a PUT request to initiate a session to the instance metadata service and retrieve a token. To set your instances as IMDSv2-only, you previously had to configure Instance Metadata Options during instance launch or update your instance after launch using the ModifyInstanceMetadataOptions API.

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