Error connecting to SQL server after upload [closed]

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I know this sounds similar to many questions already asked, but those were answered mainly by reconfiguring the connection string. In my case, the scenario is a bit different.

I'm connecting to a remote server, and everything works fine on my 开发者_StackOverflowlocal PC. I can access it via SQL Server Management Studio Express, and the application itself connects without problem. After I upload everything, without changing the connection string, I get the famous A network-related or instance-specific error occurred while establishing a connection to SQL Server error.

The connection string is like:

<add name="barConnStr" 
     connectionString = "Persist Security Info=False;
                         Data Source=XX.XXX.X.XXX\SQLDBG;
                         Initial Catalog=FGE;
                         User Id=uid;
                         Password=pass" 
     providerName     = "System.Data.SqlClient" />

Anyone got an idea why this might be happening?

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try to disable the firewall in both servers and see if it works if so you need to add rules to the firewall