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How To

Enable Windows Firewall for SQL Server

Run these commands on the Windows Server to open the ports for listening on a named instance of SQL Server.
Note: Remember to enable TCP in the SQL Server Configuration Manager.

netsh firewall set portopening protocol=TCP port=1433 name=SQLServerTCP mode=ENABLE scope=SUBNET profile=CURRENT

netsh firewall set portopening protocol=UDP port=1434 name=SQLServerUDP mode=ENABLE scope=SUBNET profile=CURRENT

For more help, refer to SQL Server & Windows Firewall.

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