sourceSecurityGroups property
The security groups that are allowed SSH access (port 22) to the worker nodes. If you specify an Amazon EC2 SSH key but do not specify a source security group when you create a managed node group, then port 22 on the worker nodes is opened to the internet (0.0.0.0/0). For more information, see Security Groups for Your VPC in the Amazon Virtual Private Cloud User Guide.
Implementation
final List<String>? sourceSecurityGroups;