IMDS versions
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↑ https://d1.awsstatic.com/events/reinvent/2019/Security_best_practices_for_the_Amazon_EC2_instance_metadata_service_SEC310
↑ https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-metadata-transition-to-version-2.html
IMDS distinguishes between v1 and v2 requests by presence of headers [1]
- IMDSv2 uses token-backed sessions [2]
- MDSv1 disabled in Amazon Linux 2023
Related
See also
- IMDS, IMDS versions (IMDSv2), IMDS initiate session,
ec2-imdsv2-check, aws ec2 modify-instance-metadata-options, /latest/meta-data, /latest/user-data, modify-instance-metadata-defaults
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