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Can I use reverse DNS with RightScale?

Background Information

What happens with reverse DNS lookups and Amazon EC2?

 


Answer

Normally, if you perform a Reverse DNS Lookup on an EC2 instance with an Elastic IP, it will resolve to an AWS generated domain name.

For example: 75.101.159.208 resolves to "ec2-75-101-159-208.compute-1.amazonaws.com"
Top Level Domain: "amazonaws.com"
Country IP Address: UNITED STATES

So even though you have your DNS Made Easy settings set to www.yoursite.com to point to the EIP 75.101.159.208, when you do an nslookup, it returns the Amazon domain instead of yoursite.com.

In April 2010, Amazon introduced support for configuring reverse DNS (RDNS) records for your Elastic IPs, which will allow you to assign a static reverse DNS record to an Elastic IP.

To apply for RDNS, you must complete Amazon's Request to Remove Email Sending Limitations form.

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Edited
Posted 11:28, 24 Oct 2013
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