Rule: EC2 Instances Should Be in a VPC

Rule Description

Remediation Steps

Step 1: Create a VPC

2. 1.
   Log in to the AWS Management Console.
4. 2.
   Navigate to the Amazon VPC service.
6. 3.
   Click on "Create VPC."
8. 4.
   Specify the desired VPC settings, such as VPC name, IPv4 CIDR block, and tenancy options.
10. 5.
    Click on "Create VPC" to create the VPC.

Step 2: Configure Network Subnets

2. 1.
   Inside the newly created VPC, select "Subnets" from the left-hand menu.
4. 2.
   Click on "Create subnet."
6. 3.
   Specify the subnet details, such as name, VPC, availability zone, and IPv4 CIDR block.
8. 4.
   Click on "Create subnet" to create the subnet.
10. 5.
    Repeat these steps to create additional subnets as needed.

Step 3: Set up Internet Gateway (IGW)

2. 1.
   Under "Internet Gateways" in the VPC dashboard, click on "Create internet gateway."
4. 2.
   Provide a name for the internet gateway and click on "Create internet gateway."
6. 3.
   Select the newly created internet gateway and click on "Actions."
8. 4.
   Choose "Attach VPC" and select the VPC created earlier.
10. 5.
    Click on "Attach" to associate the internet gateway with the VPC.

Step 4: Configure Route Tables

2. 1.
   In the VPC dashboard, select "Route tables" from the left-hand menu.
4. 2.
   Click on "Create route table."
6. 3.
   Provide a name for the route table and select the VPC.
8. 4.
   Click on "Create route table" to create the route table.
10. 5.
    Select the newly created route table and click on the "Routes" tab.
12. 6.
    Click on "Edit routes" and add a new route with the destination of "0.0.0.0/0" and the target as the internet gateway created earlier.
14. 7.
    Click on "Save routes."
16. 8.
    Select the "Subnet associations" tab and associate the desired subnets with the route table.

Step 5: Launch EC2 Instances in the VPC

2. 1.
   Navigate to the EC2 service in the AWS Management Console.
4. 2.
   Click on "Launch Instances."
6. 3.
   Select the desired AMI and instance type.
8. 4.
   In the "Configure Instance Details" section, choose the VPC and subnet within the VPC.
10. 5.
    Complete the instance configuration as needed, including security groups, storage, and tags.
12. 6.
    Click on "Review and Launch," followed by "Launch" to create the EC2 instance.

Troubleshooting Steps

2. 1.
   Verify that the VPC creation process was completed successfully.
4. 2.
   Double-check the subnet configurations, ensuring that they are associated with the correct VPC and availability zone.
6. 3.
   Confirm that the internet gateway is properly attached to the VPC and that its routes are correctly set.
8. 4.
   Confirm that the route table has the necessary routes and associations with the subnets.
10. 5.
    Ensure that the EC2 instances are launched within the VPC and associated subnets.

Example Code (if applicable)