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Understanding Shared Folders and Windows Firewall

Understanding Shared Folders and the Windows Firewall

http://technet.microsoft.com/en-us/library/cc731402.aspx

 

Sharing a folder or file creates a Windows Firewall exception for File and Printer Sharing. The exception opens the ports listed in the following table.

Connection
Ports

TCP

139, 445

UDP

137, 138

The default scope is to allow access from any computer on the network, including computers on the Internet. Unless you block incoming connections on these ports using a hardware firewall, firewall server, or other Internet-sharing device, your computer will be vulnerable to attack from the Internet as long as your Internet connection is active.

Categories: SQL Server Security
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