Connection to SQL server with EnitityFramework 6 code first - sql-server

Question

Okay my project has a separate class library that has all the EnitityFramework version 6.1.3 code and settings.
I can not get this to connect to anything other than my local sql db
I can connect to my sql box 192.111.111.111\sql_box with SQL manager, SQL server object explorer and LINQpad. so it is there and connection string is correct.
I think I am now meant to be doing code based configuration
so my App.cong looks like this
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<entityFramework codeConfigurationType="MyProject.CodeConfig, MyProject">
</entityFramework>
</configuration>
and I have also create and class that derives from DbConfiguation
public class CodeConfig : DbConfiguration
{
public CodeConfig()
{
this.SetProviderServices("System.Data.SqlClient",
System.Data.Entity.SqlServer.SqlProviderServices.Instance);
}
}
but where do I put 192.111.111.111\sql_box
every time I run Update-Database in the package manager I get
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Answer 1

In the web.config or in the app.config.
<configuration>
<connectionStrings>
<add name="YOURDBCONTEXTNAME" connectionString="data source=SERVER;initial catalog=DATABASE;Integrated Security=false;persist security info=True;user id=USER;password=PASSWORD;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />

Answer 2

Your connection string needs to be in the web/app config file in the startup project.
The connection string in the class library (assuming it is not the startup project) is used when making model changes, migrations, etc.