I have this problem I've already posted on the Amazon AWS forum. Unfortunately I haven't got a clear answer I and I was hoping you guys could help. Here's the link: http://developer.amazonwebservices.com/connect/thread.jspa?messageID=198238#198207
Basically I don't know why after associating an Elastic IP address and mapping it to one of my domains, FTP an ping work fine, but HTTP does a 302 redirect to the Amazon AWS hostname I had before associating the Elastic IP address.
Here's the question from the AWS forum: I have an EC2 instance with HTTP and FTP installed. They both worked. Then I associated an Elastic IP address to that instance. Then I mapped that IP address to a name which is a subdomain of a domain I own. I think it's an A name (I didn't do the mapping personally). Now FTP works and HTTP doesn't.
The AWS host name before the Elastic IP association: ec2-184-73-27-8.compute-1.amazonaws.com The AWS IP address and host name after the association: 22.214.171.124 and ec2-174-129-7-254.compute-1.amazonaws.com The domain which is mapped to 126.96.36.199 using an A record is: demo.flashxml.net
FTP works means that I can connect to both 188.8.131.52, ec2-174-129-7-254.compute-1.amazonaws.com and demo.flashxml.net.
HTTP doesn't work means that a HTTP request to 184.108.40.206, ec2-174-129-7-254.compute-1.amazonaws.com or demo.flashxml.net returns a 302 redirect to ec2-184-73-27-8.compute-1.amazonaws.com
Here is my VirtualHost file:
<VirtualHost *:80> DocumentRoot /home/ec2-user/public_html/wordpress ServerName demo.flashxml.net ErrorLog logs/ec2-user-error_log <Directory /home/ec2-user/public_html/wordpress> AllowOverride FileInfo Order Deny,Allow Allow from All </Directory> </VirtualHost>
I finally figured out what was wrong. It's the fact that I installed Wordpress on the server using the hostname provided by Amazon. After associating the Elastic IP and updating the DNS records, the server was reachable - FTP working was the proof of that. The 302 redirect when accessing via HTTP was caused by Wordpress's hostname settings.
So, what I've learned from all this was that I should setup my IP and DNS first and only after that install Wordpress or any other web app(s).