A VPC is a virtual network inside AWS where you can isolate your setup using private IP addresses. A VPC consists of several subnets. Each subnet is bound to an Availability Zone. A public subnet has a direct route to the Internet. As long as your EC2 instances have an public IP they can communicate (in and out) with the Internet. A private subnet does not have a route to the Internet. Instances in private subnets can not be accessed from the public Internet. If you want to access the Internet from a private subnet you need to create a NAT instance.

This template describes a VPC with two private and two public subnets.

1. 
2. Click Next to proceed with the next step of the wizard.
3. Specify a name and all parameters for the stack.
4. Click Next to proceed with the next step of the wizard.
5. Click Next to skip the Options step of the wizard.
6. Click Create to start the creation of the stack.
7. Wait until the stack reaches the state CREATE_COMPLETE

This template describes a VPC with three private and three public subnets.

1. 
2. Click Next to proceed with the next step of the wizard.
3. Specify a name and all parameters for the stack.
4. Click Next to proceed with the next step of the wizard.
5. Click Next to skip the Options step of the wizard.
6. Click Create to start the creation of the stack.
7. Wait until the stack reaches the state CREATE_COMPLETE

This template describes a VPC with four private and four public subnets.

1. 
2. Click Next to proceed with the next step of the wizard.
3. Specify a name and all parameters for the stack.
4. Click Next to proceed with the next step of the wizard.
5. Click Next to skip the Options step of the wizard.
6. Click Create to start the creation of the stack.
7. Wait until the stack reaches the state CREATE_COMPLETE

This template describes a NAT Gateway that forwards HTTP, HTTPS and NTP traffic from private subnets to the Internet.

1. 
2. Click Next to proceed with the next step of the wizard.
3. Specify a name and all parameters for the stack.
4. Click Next to proceed with the next step of the wizard.
5. Click Next to skip the Options step of the wizard.
6. Check the I acknowledge that this template might cause AWS CloudFormation to create IAM resources. checkbox.
7. Click Create to start the creation of the stack.
8. Wait until the stack reaches the state CREATE_COMPLETE

This template describes a highly available Network Address Translation (NAT) instance that forwards HTTP, HTTPS and NTP traffic from private subnets to the Internet.

1. 
2. Click Next to proceed with the next step of the wizard.
3. Specify a name and all parameters for the stack.
4. Click Next to proceed with the next step of the wizard.
5. Click Next to skip the Options step of the wizard.
6. Click Create to start the creation of the stack.
7. Wait until the stack reaches the state CREATE_COMPLETE

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