After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens ports 0-1024 for public networks

After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens only the required service ports for public networks

The administrator wants to build multiple applications on an ECS instance. For easy management, the administrator uses default settings and allows any IP address to access required service ports

After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens all ports for public networks