The command curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"

curl http://169.254.169.254/latest/api/token command is essential for initiating a session with the Amazon Web Services (AWS) Instance Metadata Service Version 2 (IMDSv2), providing enhanced security against SSRF attacks. By issuing an HTTP PUT request to this endpoint, instances generate a short-lived, secure token required to access sensitive metadata and IAM credentials, replacing the vulnerable IMDSv1 standard. Read more about this security upgrade on the

Get the full benefits of IMDSv2 and disable IMDSv1 ... - AWS

Get the full benefits of IMDSv2 and disable IMDSv1 ... - AWS

is the standard method for requesting a session token from the Amazon EC2 Instance Metadata Service Version 2 (IMDSv2). This PUT request, which includes a custom TTL header, initiates a secure session to prevent SSRF vulnerabilities and unauthorized metadata access by requiring token authentication. For more information, visit aws.amazon.com