How Do I Resolve Domain Names From AWS to On-Premises Data Centers?

Introduction

In today’s interconnected world, businesses often need to integrate their on-premises data centers with cloud services. One critical aspect of this integration is resolving domain names from AWS to on-premises networks. This guide will walk you through configuring domain name resolution using AWS Route 53 and a VPN connection to your on-premises data center. By following these steps, you can ensure seamless communication between your AWS resources and on-premises infrastructure.

Step-by-Step Guide

To achieve domain name resolution from AWS to on-premises data centers, follow these steps:

1. Create a VPC

   • Establish a Virtual Private Cloud (VPC) that will be associated with your Route 53 private hosted zone. This VPC acts as an isolated network within AWS.

2. Set up a VPN Gateway

   • Deploy a VPN Gateway to facilitate the secure connection between AWS and your on-premises network.

3. Configure the Customer Gateway

   • Define the Customer Gateway with the necessary information about your on-premises gateway device. This serves as the anchor point on the on-premises side of the VPN connection.

4. Create a VPN Connection

   • Establish the VPN connection between AWS and your on-premises network. This connection allows secure data transfer between the two environments.

5. Configure the Private Hosted Zone

   • Set up a Route 53 private hosted zone for internal DNS resolution. This zone will store the domain names you want to resolve within your VPC.

6. Associate the Hosted Zone with the VPC

   • Link the private hosted zone with the VPC to enable DNS resolution for resources within the VPC.

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

const main = new aws.ec2.Vpc("main", {cidrBlock: "10.0.0.0/16"});
const gw = new aws.ec2.InternetGateway("gw", {vpcId: main.id});
const r = new aws.ec2.RouteTable("r", {vpcId: main.id});
const example = new aws.ec2.Route("example", {
    routeTableId: r.id,
    destinationCidrBlock: "0.0.0.0/0",
    gatewayId: gw.id,
});
const mainVpcDhcpOptions = new aws.ec2.VpcDhcpOptions("main", {
    domainName: "example.com",
    domainNameServers: ["AmazonProvidedDNS"],
});
const a = new aws.ec2.VpcDhcpOptionsAssociation("a", {
    vpcId: main.id,
    dhcpOptionsId: mainVpcDhcpOptions.id,
});
const cgw = new aws.ec2.CustomerGateway("cgw", {
    bgpAsn: "65000",
    ipAddress: "203.0.113.1",
    type: "ipsec.1",
    tags: {
        Name: "CustomerGateway",
    },
});
const vpg = new aws.ec2.VpnGateway("vpg", {
    vpcId: main.id,
    tags: {
        Name: "VPNGateway",
    },
});
const vpn = new aws.ec2.VpnConnection("vpn", {
    customerGatewayId: cgw.id,
    vpnGatewayId: vpg.id,
    type: "ipsec.1",
    staticRoutesOnly: true,
    tags: {
        Name: "VPNConnection",
    },
});
const vpnRoute = new aws.ec2.Route("vpn_route", {
    routeTableId: r.id,
    destinationCidrBlock: "192.168.1.0/24",
    gatewayId: vpg.id,
});
const _private = new aws.route53.Zone("private", {
    name: "example.internal",
    vpcs: [{
        vpcId: main.id,
    }],
});

Key Points

• VPC and Subnet: Establishes an isolated network within AWS.
• Internet Gateway: Connects the VPC to external networks, including the internet.
• DHCP Options: Provides domain name resolution within the VPC.
• Customer Gateway: Represents the on-premises gateway for the VPN connection.
• VPN Gateway: Serves as the VPN endpoint on the AWS side.
• VPN Connection: Enables secure communication between AWS and on-premises networks.
• Route 53 Private Hosted Zone: Facilitates internal DNS resolution within the VPC.

Conclusion

By following this guide, you have successfully configured domain name resolution from AWS to your on-premises data center using Route 53 and a VPN connection. This setup ensures that your AWS resources can seamlessly communicate with your on-premises infrastructure, providing a cohesive and integrated networking environment.