Subdomain that uses Route 53 without migrating parent domain

by

I currently have a domain (asoba.co) that is hosted on Linode, and for which I use Linode nameservers. This site currently works as expected.

My goal is to have an additional subdomain for a webapp that is being served from an EC2 instance. I initially followed the instructions from AWS here on this procedure. The instructions had me create a hosted zone in Route 53
(picture of record set within the hosted zone) along with appropriate records. Here I just created an A record that maps the subdomain to the Elastic IP address I assigned to the EC2 instance.

It then had me update the NS records for the subdomain on Linode like you see in this screenshot.

After waiting a few hours, I tested the record set in Route 53, which got the result I was expecting

Response returned by Route 53
Response from Route 53 based on the following options.

DNS request sent to Route 53
data.asoba.co.     IN     A
EDNS0 client subnet IP
24
DNS response code
NOERROR
Protocol
UDP
Response returned by Route 53
35.169.115.40

However, when I point my browser to the subdomain, I get the “domain does not exist” error. Same thing when I use the “check my dns” services.

Is there a step that I have missed here?

Answer

I currently have a domain (asoba.co) that is hosted on Linode, and for which I use Linode nameservers.

Unless you changed something very quickly after posting your question, it’s looking like Linode isn’t being used for your domain:

$ dig soa asoba.co

; <<>> DiG 9.11.6-P1-RedHat-9.11.6-3.P1.fc30 <<>> soa asoba.co
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50883
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;asoba.co.                      IN      SOA

;; ANSWER SECTION:
asoba.co.               3554    IN      SOA     ben.ns.cloudflare.com. dns.cloudflare.com. 2028984216 10000 2400 604800 3600

;; AUTHORITY SECTION:
asoba.co.               86348   IN      NS      grace.ns.cloudflare.com.
asoba.co.               86348   IN      NS      ben.ns.cloudflare.com.

As a result, you did the work in Linode to delegate a subdomain, but since the main domain asoba.co is hosted by Cloudflare, it’s all for naught:

$ dig soa data.asoba.co

; <<>> DiG 9.11.6-P1-RedHat-9.11.6-3.P1.fc30 <<>> soa data.asoba.co
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 18272
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;data.asoba.co.                 IN      SOA

The pertinent result in the above query being: status: NXDOMAIN

So you need to either go to your domain’s registrar and change DNS to Cloudflare, and then work with Cloudflare to delegate a subdomain, or go to your registar and switch your authoritative name servers to use Linode.

Attribution
Source : Link , Question Author : shingi , Answer Author : Wesley

Leave a Comment