Connecting to a subdomain severs the connection to the domain itself. What's going on?

Posted by TheAgent on Server Fault See other posts from Server Fault or by TheAgent
Published on 2010-05-20T13:49:10Z Indexed on 2010/05/20 13:50 UTC
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domain

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connection

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subdomain

Hi all.

We have a website on a third-party server (server leased and shared with other websites) and the server provides access to our SQL Server database through a subdomain in the form of mssql.DomainName.com.

I was told to use SQL Management Studio Express to connect to this subdomain in order to manage the database. After a few tries and getting many "Timeout" messages, I finally manage to connect to the server; everything's fine. But now I can't connect to DomainName.com anymore. Trying to browse DomainName.com using Firefox, it tries to "lookup" DomainName.com address and fails, telling me "the server was not found". I have to disconnect Management Studio from the server and wait a couple of hour for DomainName.com to become available again, and after that, trying to reconnect to the SQL Server again repeats the scenario. While I can't browse DomainName.com directly, I can use a proxy to connect to it, meaning that the problem is somehow related to a DNS my computer tries to ask to translate the name to the corresponding IP.

Anyone seen anything like this before? Any ideas?

Thanks in advance.

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