By default, all subnets within the same VPC are fully connected. Therefore, to ensure network permission control between different businesses, it is recommended that different subnets be associated…

By default, all subnets within the same VPC are fully connected. Therefore, to ensure network permission control between different businesses, it is recommended that different subnets be associated with different subnet security group policies based on the actual business needs of the business systems carried in the subnets, and network access permissions between businesses be strictly controlled. After the security group rules are configured, the cloud server needs to be restarted for the existing network traffic to take effect.