Dynamic DNS (IP) for Route 53 Domain

Question

Hi,

I have a domain on Route 53 and I'd like to use my own private server (NAS) to host my site. My server is publicly accessible but it is behind a dynamic IP. I also have a Dynamic DNS with dynu. My question is how can I setup my domain to get my servers latest/current IP address?

Many thanks for your help

Accepted Answer

Hello -

One way to do this if you are using dynamic DNS tools like dynu or DuckDNS is that you create a CNAME record for one of your subdomains such as www.yourdomain.com with the value of the dynamic DNS service domain name.

You can also refer to the following [post](https://aws.amazon.com/blogs/startups/how-to-build-a-serverless-dynamic-dns-system-with-aws/) highlighting how you could implement automation to update records directly in R53. Note you can also modify the code and make API calls to R53 in your local machine vs Lambda.

Answer

You can simply have your instance update the record in Route 53 to point to the new IP address.

For example:

```
# Update Route 53 Record Set based on the Name tag to the current Public IP address of the Instance
MY_IP=$(curl -s http://169.254.169.254/latest/meta-data/public-ipv4/)

aws route53 change-resource-record-sets --hosted-zone-id $ZONE --change-batch '{"Changes":[{"Action":"UPSERT","ResourceRecordSet":{"Name":"'$NAME_TAG'","Type":"A","TTL":300,"ResourceRecords":[{"Value":"'$MY_IP'"}]}}]}'
```

For a full example of this process, see: [Amazon Route 53: How to automatically update IP addresses without using Elastic IPs - DEV Community](https://dev.to/aws/amazon-route-53-how-to-automatically-update-ip-addresses-without-using-elastic-ips-h7o)

Dynamic DNS (IP) for Route 53 Domain

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