Why auto‑assigned public IP is disabled

Even if your original Fargate service uses auto‑assigned public IPs, Flexera recreates the service on EC2 instances during optimization. When that happens, AWS applies EC2 networking rules.

AWS blocks public IP assignment for EC2 launch types. You may see an error similar to:

code='InvalidParameterException', message='Assign public IP is not supported for this launch type.'

Because of this restriction, the cloned service created on EC2 instances has auto‑assign public IP disabled.

What this means

This behavior is expected and follows AWS service limits. EC2‑based tasks must use a different networking configuration, such as private IPs with NAT gateway access.