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By:
juanra

Cloudflare: Pointing subdomains to a different droplets?

May 24, 2017 256 views
DNS Networking Ubuntu 16.04

Hi,

I have my main domain.com pointing to 1.2.3.4 droplet. Now I want to set my new app.domain.com to 5.6.7.8 droplet using CloudFlare.

For this I created an A record with the name app and the value 5.6.7.8, but for some reason when I check the DNS propagation or when I ping app.domain.com, it still resolves to 1.2.3.4.

This is my current configuration:

Type Name Value TTL
A app points to 5.6.7.8 Automatic

A domain.com points to 1.2.3.4 Automatic

A www points to 1.2.3.4 Automatic

Any idea of why this may be happening?

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1 Answer
jtittle1 May 25, 2017

@juanra

Generally what I'd recommend setting up is:

A          domain.com   DROPLET_01_IP
CNAME      www          domain.com

A          app          DROPLET_02_IP
CNAME      www.app      app.domain.com

DROPLET_01_IP = 1.2.3.4

DROPLET_02_IP = 5.6.7.8

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  • juanra May 25, 2017

    This works perfectly. Thank you very much. Do you have any idea why the ww.app record is necessary?

    • jtittle1 May 25, 2017

      @juanra

      It all depends on setup.

      If there's something in your config using www or www.app, then you'd need those entries -- even if it's a redirect. Generally it's always a good idea to setup the www variant as it's a common use URL. Many may type it in before they type in your address without it, thus if it's not properly setup, it could error out or just not work at all -- the end result, you lose some degree of potential traffic and/or customers (if you're selling something).

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