If you would like to have security control over internet traffic from the File Storage
               Security, specify the parameters as follows when you create or update stacks.
- SubnetIDs: A comma-separated list of VPC Subnet IDs that are attached to Lambda functions.
- SecurityGroupIDs: A comma-separated list of VPC Security Group IDs that are attached to Lambda functions.
- NetworkProxy: Network proxy setting in the format
                  scheme://[user:pass@]host:port, for examplehttp://proxy.server:8080. Leave it blank if you don't want Lambda functions to connect to an explicit proxy in the VPC.
|  | NoteMake sure the subnets have access to domains .amazonaws.com and
                              .trendmicro.com over HTTPS | 
Refer to the AWS documents for the infrastructures of VPC
 
		