137,138,139 Dangerous Port method shutdown in Windows

Port 137:137 ports are used primarily for the NetBIOS name Service (NetBIOS names services).

138 ports belong to the UDP port, they will play a role when they transmit file information to each other in the LAN. The main function of the 138 port is to provide the computer name browsing function in the NetBIOS environment.

138 port It is open for sharing, you should not be allowed to share your machine, so you should turn off all of these ports by clicking the "start → control Panel → system → hardware → Device Manager", click "Show hidden Devices" under the View menu, and double-click Non-Plug and Play drivers. Locate and double-click Netbiosovertcpip, and in the Open Netbiosovertcpip Properties window, click "Do not use this device (deactivate)" Under the General tab, and then restart after clicking the OK button.

Port 139:139 ports are provided for the NetBIOS session service and are primarily used to provide Windows file and printer sharing and Samba services in UNIX.

Close method

Start-Settings-Network and dial-up connections-Local Area Connection-TCP/IP Properties-Advanced-wins-Select ' Disable NetBIOS on tcp/it '
To see the currently open port can start-run-cmd-netstat-na, after you change the end of this command to look at, these 3 ports should be closed, does not affect the use of, this is only in fact one, there are more ways.