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Steps for Window 7 and later system to set Port and prevent WannaCrypt attacking

Turn on your Windows Firewall

1. Open your Control Panel, you may click "Control Panel" at start menu:


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2. Click the "System and Security" first and then click "Windows Firewall":


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3. Click "Turn Windows Firewall on or off" and following ticks to turn on Windows Firewall



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Set the Rules for Port:

4. Click the "Advanced Settings" to set the Inbound Rules


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5. Click the "Inbound Rules" and then click the "New Rule" at the right side.


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6. Click the "Port" to set the rules of "TCP 445".


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7. Choose the "TCP" and set the Specific local ports as "445".


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8. Choose "Block the connection" at below.


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9. Make sure all these three items has been applied, and click next: 


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10. Type "445" at Name, and click "Finish" to complete the set.


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11. When your screen showed below, then "445tcp" rule has been added successfully.


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12. Keep setting the rules of "445 udp". (Same operations on adding new rules)



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13. Then click "UDP" and set the Specific local ports as "445"


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14. Choose "Block the connection" as below.


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15. Make sure all these three items have been applied, and click next.


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16. Type "445 udp" at Name, and click "Finish" to complete the setting.


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17. The finished window:


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