Understanding security in SAM

So far, we have learned how to write, build, package, and deploy Lambda functions using the SAM. We will now understand how security works inside them:

1. You can scroll to the bottom of the Lambda console to see the network and security settings, where the VPC and the subnet details are mentioned:

2. Now, we will add in the network settings, which include the security groups and the subnet IDs:

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: A starter AWS Lambda function.
Resources:
    helloworldpython3:
        Type: 'AWS::Serverless::Function'
        Properties:
            Handler: lambda_function.lambda_handler
            Runtime: python3.6
            CodeUri: .
            Description: A starter AWS Lambda function.
            MemorySize: 128
            Timeout: 3
            VpcConfig:
                SecurityGroupIds:
                    - sg-9a19c5ec
                SubnetIds:
                    - subnet-949564de...