I am still receiving error:
System.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
I am using mssql3.[MyResellerDomain].com as data source for connection string and currently it pings to IP 173.0.139.236.