Amazon EC2 SQL Server Connection

Posted by cnxmax on Server Fault See other posts from Server Fault or by cnxmax
Published on 2010-04-24T08:48:48Z Indexed on 2010/04/24 8:53 UTC
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sql-server

I have two instances running on Amazon AWS EC2. One is running MSSQL Server 2005, the other is running a web application.

I CAN connect to the database in my app using a connection string that references the Public IP of my EC2 instance running SQL Server.

I CANNOT connect from the web app server if I change the connection string to reference the database servers Private IP Address. But I can connect if I run that same code on the database server itself.

I can remote desktop from the app server to the database server using the private IP.

I have a feeling there is something in my SQL Sever configuration that is preventing this remote connection. I have remote connections enabled, I have it set to listen on all IP addresses.

Any ideas?

Other things I've done: - Added exceptions to Windows Firewall - Tried connecting to using EC2 DNS Names

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