I just launched an instance of Windows server 2008 on Amazon EC2.

This instance is in a security group allowing RDP and HTTP. Here are the allowed connections on this instance

"Connection Method" Protocol "From Port" "To Port" "Source (IP or group)" 
RDP                 tcp      3389         3389    
HTTP                tcp      80           80

I installed tomcat on this server on port 80. I can connect using rdp to the machine, and, using its local Internet Explorer, I can view the welcome page of tomcat on http://localhost

Now, I would like to see this from outside the amazon network, but when I connect to the public DNS of my instance, something looking like :


I get no response. Any idea on how to troubleshoot this ?


Have you checked the Windows firewall on the instance?

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