How to disable port settings to prevent viruses and hacker intrusion

The specific operation is as follows: by default, Windows has many ports that are open. When you access the Internet, network viruses and hackers can connect to your computer through these ports.

To change your system to a copper wall, you should close these ports, mainly including TCP 135, 139, 445, 593, 1025, and UDP 135, 137, 138, and 445, some popular Backdoor Ports (such as TCP 2745, 3127, and 6129) and remote service access port 3389. The following describes how to disable these Network Ports in WinXP/2000/2003:

Step 1: click "start" menu/settings/control panel/management tools, double-click to open "Local Security Policy", select "IP Security Policy, on the local computer ", right-click the blank position in the right pane, and select "create IP Security policy" (as shown in the figure on the right) in the shortcut menu. A wizard is displayed. Click "Next" in the Wizard to name the new security policy. Then, press "Next" to display the "Secure Communication Request" screen, remove the hooks on the left of "Activate default rules" on the screen. Click "finish" to create a new IP Security Policy.

Step 2: Right-click the IP Security Policy. In the "properties" dialog box, remove the hook on the left of "use add wizard" and click "add" to add a new rule, then, the "new rule attributes" dialog box appears. Click the "add" button on the screen to bring up the IP Filter list window. In the list, remove the check on the left of "use add wizard, then, click "add" on the right side to add a new filter.

Step 3: Go to the "Filter Properties" dialog box. First, you will see addressing. Select "any IP Address" as the source address, select "my IP Address" as the target address, and click the "protocol" tab, in the "select protocol type" drop-down list, select "TCP" and enter "135" in the text box under "to this port ", click the "OK" button (such as the picture on the left) to add a filter to shield the TCP 135 (RPC) port, which can prevent the outside world from connecting to your computer through port 135.

Click "OK" and return to the filter List dialog box. A policy has been added, repeat the preceding steps to add TCP 137, 139, 445, 593, UDP 135, 139, and 445 ports and create corresponding filters for them.

Repeat the preceding steps to add a blocking policy for TCP ports 1025, 2745, 3127, 6129, and 3389, create a filter for the preceding port, and click OK.

Step 4: In the "new rule attributes" dialog box, select "new IP Filter list" and click a dot in the circle on the left to indicate that the IP address has been activated, click the filter action tab. On the "Filter Operations" tab, remove the hooks on the left of "use add wizard" and click "add" to add the "Block" Operation (right ): on the "Security Measures" tab of "New Filter operation properties", select "Block" and click "OK.

Step 5. Enter the "new rule attributes" dialog box and click "New Filter operation". A dot is added to the circle on the left to indicate that the operation has been activated. Click "close" to close the dialog box; return to the "new IP Security Policy attributes" dialog box, tick the left side of the "new IP Filter list", and click "OK" to close the dialog box. In the "Local Security Policy" window, right-click the newly added IP Security Policy and select "Assign ".

After the restart, the above network ports on the computer are closed, and viruses and hackers can no longer connect to these ports, thus protecting your computer.