How to close port 445, how to close port 445 of Win7

Cybersecurity experts recommend that users disconnect the network and turn on the phone, that is, unplug the network cable before turning it on, so as to basically avoid being infected by ransomware. After booting up, you should find a way to apply security patches or install defense tools launched by various network security companies to connect to the Internet. It is recommended to back up the important files and data in the computer to the mobile hard disk and USB flash drive as soon as possible, and save the disk offline after the backup, and at the same time be vigilant against unknown links, files and emails.

Temporary Solution:

1. Turn on the system firewall.

2. Use the advanced settings of the system firewall to block the connection to port 445 (this operation will affect the service that uses port 445).

3. Turn on the automatic update of the system, and detect the update for installation.

Win7, Win8, Win10 process.

1. Open Control Panel - System & Security - Windows Firewall, and click on the left side to start or disable Windows Firewall.

2. Select Start Firewall and click OK.

3. Click Advanced Settings.

4. Click Inbound Rule to create a new rule.

5. Select the port, Next.

6. For a specific local port, enter 445 and go next.

7. Select Block Connection, Next.

8. Profile, Select All, Next.

9. The name can be entered arbitrarily and completed.

The process flow of the XP system.

1. Open Control Panel, Security Center, Windows Firewall, and select Enable.

2. Click Start, Run, enter cmd, and confirm the execution of the following three commands: net stop rdr, net stop srv, net stop netbt

Every computer's system will open some useless ports after booting up, and these ports tend to slow down the operation of the system. And some ports can also be used by some hackers to hack into other people's computers. So, how do we shut down these useless or dangerous ports?

1. Select "Run" in the "Start" menu, enter "and press Enter" to open the local Group Policyr. Computer Configuration--- Windows Settings--- Security Settings--- IP Security Policy, in Local Computer

2. Take closing port 135 as an example (the operation is the same for other ports):

Right-click in the margin on the right side of the local group policyr, select Create IP Security Policy, pop up the IP Security Policy Wizard dialog box, and click Next. In the dialog box that appears, write "Close Port" (optional) in the name (optional), and click Next; dialog box'The "Activate Default Response Rule" option is unchecked and click Next; Select Properties and click OK.

3. In the "Close Port Properties" dialog box that appears, select the "Rules" tab, remove the check mark in front of "Use Add Wizard", and click the "Add" button.

4. In the pop-up "New Rule Properties" dialog box, select the "IP Filter List" tab, and click "Add" in the lower left corner

5. The Add dialog box appears, fill in the name of "Seal Port" (you can fill in at will), remove the tick in front of "Use Add Wizard", and click the "Add" button on the right.

6. In the "IP Filter Properties" dialog box that appears, select the "Address" tab, select "Any" for "Source Address", and select "My IP Address" for "Destination Address"; Select the "Agreement" tab, and click "OK" when you're done.

7. Return to the "IP Filter List" and click "OK". Return to the New Rule Properties dialog box.

8. Select the "Block Port" you just added in the IP filter list, then select the "Filter Operation" tab, remove the check mark in front of "Use Add Wizard", and click the "Add" button.

9. In the Filter Action Properties, select the Security Method tab and select the Block option; In the General tab, give the action a name, and click OK.