BlogAdding Dynamic DNS to a subdomain.

Adding Dynamic DNS to a subdomain.

Posted by Jesse on February 04, 2009

So, I've got this great domain setup, but it seemed to be lacking one thing.  I wanted to give my personal server a URL within the Jessebowes.com domain.  After a lot of playing around, I found it to be really easy to do.

Here's how to set it up so that you can access your personal server through subdomain.domain.com

Step 1. Set up a dynamic DNS hostname.  For this, I used the Free Dynamic DNS service from DynDNS.com.  From now on, lets refer to this a dynamic.dyndns.org, where dynamic is the hostname you chose.  You need to make sure you can get to your locally hosted website by going to http://dynamic.dyndns.org

Step 2. Set up a CNAME DNS entry on your hosted web account.  This varies per provider, but for me its really easy through Dreamhosts's web panel.  Set up up in the following format:

Name     subdomain
Type     CNAME
Value     dynamic.dyndns.org


Step 3.  You'll want your new subdomain to resolve correctly everytime your IP address changes, so look into eitherhttps://www.dyndns.com/support/clients/ or 3rd party router firmware such as Tomato or DD-WRT, so your dyndns address is always pointing at your current IP.

 

Thats it!  Now http://subdomain.domain.com should load the same page as http://dynamic.dyndns.org.

 

NOTE:  It typically takes a while for DNS entries to propogate across the internet.  Please allow several hours for subdomain.domain.com to become active.

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