" How to Access the Internet via NAT Gateway in AWS VPC."

TABLE OF CONTENTS

• Introduction

• Setup VPC

• Create Subnets

• Create an Internet Gateway (IGW)

• Setup Route tables

• Create a NAT Gateway

• Update Private Route Table

• Launch Instances

• Testing

• Conclusion

Introduction

In this post, we'll show you how to set up a NAT Gateway in AWS VPC to allow instances in a private subnet to access the internet.

Setup VPC

• Go to the VPC Dashboard in AWS Management Console.

• Click "Create VPC."

Create Subnets

Create an Internet Gateway

• In the VPC Dashboard, click "Internet Gateways."

• Click "Create internet gateway."

Setup Route tables

Public Route Table

• Click "Routes" and then "Edit routes."

• Add a route with destination '0.0.0.0/0' & target as Internet Gateway

• Associate this route table with Public Subnet.

Private Route Table

• Click "Routes" and then "Edit routes."

• Add a route with destination 0.0.0.0/0 and target as the NAT Gateway.

• Associate this route table with Private Subnet.

Create a NAT Gateway

• In the VPC Dashboard, click "NAT Gateways."

• Click "Create NAT Gateway.".

• Select Public Subnet and allocate an Elastic IP, and click "Create NAT Gateway."

Update Private Route Table

• In the VPC Dashboard, click "Route Tables."

• Select Private Route Table & Click "Routes," and then "Edit routes."

• Add a route with destination 0.0.0.0/0 and target as the created NAT Gateway.

Launch Instances

Testing

SSH into the instance in Public Subnet to ensure it has internet access & SSH into the instance in Private Subnet through Public Subnet to test internet access (e.g. ping 8.8.8.8)

Conclusion

Setting up a NAT Gateway in AWS VPC allows your instances in private subnets to securely access the internet. This guide simplifies the process, ensuring your resources can communicate efficiently.