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Hello.
The subnet where the ECS task is deployed should be a private subnet.
Also, make sure that there is a route to the NAT Gateway in the route table of the deployed subnet.
The configuration is similar to the following document.
https://docs.aws.amazon.com/AmazonECS/latest/bestpracticesguide/networking-outbound.html#networking-private-subnet
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Thanks for you answers, actually I also try a private subnet sir, It able to access to global via nat but the static ip still not get on ecs task
As described in this document, it is not possible to set an Elastic IP directly to a task. https://repost.aws/knowledge-center/ecs-fargate-static-elastic-ip-address
In other words, if the destination has IP address restrictions or other restrictions, it is necessary to register to allow the NAT Gateway's IP address.