A few weird issues in the networking on our custom AWS EKS Workers, and how we worked around them

For reasons , at work we run AWS Elastic Kubernetes Service (EKS) with our own custom-built workers. These workers are based on Alma Linux 9, instead of AWS preferred Amazon Linux 2023. We manage the deployment of these workers using AWS Auto-Scaling Groups. Our unusal configuration of these nodes mean that we sometimes trip over configurations [ ]