Question

How do AWS NACLs and Security Groups contribute to network security in AWS environments?

Answer 1

• AWS NACLs provide an additional layer of security by controlling traffic at the subnet level, which can be useful for compliance and regulatory requirements.
• Security Groups offer granular control at the instance level, reducing the attack surface and ensuring that only necessary traffic is allowed.

Example Code for AWS NACL:

Resources:
  MyNetworkACL:
    Type: "AWS::EC2::NetworkAcl"
    Properties:
      VpcId: vpc-12345678
      Tags:
        - Key: Name
          Value: my-network-acl 

Example Code for Security Group:

Resources:
  MySecurityGroup:
    Type: "AWS::EC2::SecurityGroup"
    Properties:
      GroupName: MySecurityGroup
      GroupDescription: My security group
      VpcId: vpc-12345678