Create Internet Gateway and Routing Table

To create an internet gateway, follow these steps:

1. Open the Amazon VPC console.
2. In the navigation pane, click Internet Gateways.
3. Click Create internet gateway
4. Provide a name to the gateway my-igw
5. Once created this needs to be attached to VPC. Click on the my-igw and it will show you the details.
6. On right top corner Actions -> Attach to VPC

7. Select the VPC myvpc and click Attach internet gateway

Note

Generally, you only need one internet gateway for each VPC. An internet gateway is a highly available and scalable component that allows you to route traffic between your VPC and the internet.

Viewing Routing Tables

1. Open the Amazon VPC console (https://console.aws.amazon.com/vpc/).
2. In the navigation pane, choose Route Tables.
3. Select the VPC for which you want to view routing tables.
4. The routing tables for the selected VPC will be displayed in a list.
5. Click on the name of a routing table to view its details.

Note

This table shows a destination 172.31.0.0/16 and target local - meaning that any traffic goes to this IP range will be routed locally within the VPC.

0.0.0.0/0 meaning that any other IP outside that range will be routed to Internet Gateway from which the traffic will be passed out to the internet

Editing Routing Table

1. Open the Amazon VPC console (https://console.aws.amazon.com/vpc/).
2. In the navigation pane, choose Route Tables.
3. Select the VPC myvpc for which you want to view routing tables.
4. The routing tables for myvpc will be displayed in a list.
5. Click on the name of a routing table to view its details.
6. To make the subnet associated with this routing table to access the internet, you need to add a new route as below,

7. Click “Save Changes” and now the subnet is public subnet

• I have created an Internet Gateway and attached to my VPC.
• I have edited the Routing Table to make subnet public.