I have installed SQL Server 2014 named instance and configured to connect on static port 1433(Default SQL port).
For example:
db.mycompany.com\SQL2015,1433
But it's able to connect to the default instance without any port (the default instance, which I didn't install and which is not present in SQL Server configuration manager).
i.e. I am able to connect with this string:
db.mycompany.com
Can anyone help figure out this issue and stop the default instance?