How do I set up PTR records in AWS Route 53?

In this guide, we will set up PTR records for reverse DNS lookups using AWS Route 53 with Pulumi. PTR records are used to map an IP address to a domain name, which is the reverse of the more common A and AAAA records that map domain names to IP addresses. This is useful for various applications, including email servers and network troubleshooting.

We’ll define a PTR record for an IP address within a Route 53 hosted zone.

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

// Define the Route 53 hosted zone
const hostedZone = new aws.route53.Zone("exampleZone", {
    name: "example.com",
});

// Define the PTR record
const ptrRecord = new aws.route53.Record("ptrRecord", {
    zoneId: hostedZone.zoneId,
    name: "1.0.0.192.in-addr.arpa", // Reverse IP for 192.0.0.1
    type: "PTR",
    ttl: 300,
    records: ["example.com."],
});

// Export the hosted zone name and the PTR record name
export const zoneName = hostedZone.name;
export const ptrRecordName = ptrRecord.name;

Key Points

• We created a Route 53 hosted zone named example.com.
• We defined a PTR record within this hosted zone to map the IP address 192.0.0.1 to example.com.
• The PTR record name follows the reverse IP notation, 1.0.0.192.in-addr.arpa.

Summary

In this guide, we set up a PTR record for reverse DNS lookups using AWS Route 53 with Pulumi. We defined a hosted zone and created a PTR record to map an IP address to a domain name, enabling reverse DNS functionality. This setup is essential for applications requiring reverse DNS lookups, such as email servers.