Jan 30, 2023

Create an AWS VPC with public and private subnets with NAT gateway.

In this article we will create a new vpc in AWS with public and private subnets along with NAT gateway, public and private route tables. so that, the private subnets have internet access and public subnets only exposed to the public access

1. create a new VPC

create a vpc with above settings. choose a cidr block for IPV4 as 10.0.0.0/16 and tenancy with default

2.Public Subnet

Next, create a public subnet with the below configurations. choose a cidr block for IPV4 as 10.0.1.0/24

modify public subnet settings by enabling Auto-assign IP as below

3. Create private subnet

Next, create a public subnet with the below configurations. choose a cidr block for IPV4 as 10.0.2.0/24

4. Attach Internet Gateway

create an Internet gateway and attach it to the vpc as below

Create Internet gateway.
click Actions dropdown button and select attach vpc to attach internet gateway to your vpc.

5. Create NAT Gateway

create NAT gateway in public subnet
attach elastic IP to the NAT Gateway

6. Create Public and Private Route Tables.

7. Add Internet Gateway and public subnet to Public Route Table

Click edit routes button under routes section in public Route Table
Add Internet Gateway to routes as below

After attaching the internet gateway, move to Subnet associations and click subnet associations button.
select public subnet and save association

8. Add NAT gateway and private subnet to Private Route Table

Click edit routes button under routes section in private Route Table
Add NAT Gateway to routes as below

After attaching the internet gateway, move to Subnet associations and click subnet associations button.
select public subnet and save association

That's it your VPC with public and private subnet is ready for production.