I received the following warning - how do I resolve this...block the port or service
Network security advisory from AT&T Internet Services Security Center - Open MC-SQLR Detected
AT&T U-verse Site ID: xxx
Charles xxx
Billing Acct Ending: xxx
Dear Charles xxx,
AT&T has received information indicating that one or more hosts using your Internet connection are running an MS-SQL Server Resolution Service (MC-SQLR) that is open to the Internet.
The IP address 108.xxx was observed with publicly accessible MC-SQLR on May 26, 2017 at 2:50 AM EDT. Our records indicate that this IP address was assigned to you at this time.
Incident details for 108.xxx
Port: 1434
Server name: XXXXX
Instance name: SQLSERVER12
MC-SQLR can be abused to reveal details about your computers, and also for denial-of-service attacks against other computers. Please consider using a firewall to restrict access to port 1434 to specific IP addresses; or disabling MC-SQLR on your computer(s) if it is not needed. Detailed information about MC-SQLR abuse and how to mitigate it is available at http://tools.cisco.com/security/center/viewAlert.x?alertId=37132.
Regards, AT&T Internet Services Security Center