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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:

start.png

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

system.png

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

1494837032698164.png

customize-setting.png

Set the Rules for Port:

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

advanced-settings.png

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

inbound.png

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

port.png

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

tcp.png

8. Choose "Block the connection" at below.

block.png

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

3rules.png

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

445.png

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

445tcpadded.png

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

inbound.png

port.png

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

udp.png

14. Choose "Block the connection" as below.

block.png

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

3rules.png

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

name445udp.png

17. The finished window:

finish.png

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