Step 1: Need to open the desktop of the computer, right-click "Online Neighbors → Properties → Local Connection → Internet Protocol (TCP / IP) → Properties → Advanced → Option -TCP / IP Filter - Properties". Step 2: You see a window is about "TCP / IP Filter", first click on "Enable TCP / IP Filter (All Adapters)". On the "TCP port, UDP port, IP protocol" add box, click "Allow", then press the Add button, then enter the port on the dialog box, usually the port we use to access the Internet is: 80, 8080 And the port of the mail server is: 25, 110, and the port of FTP is 20, 21, and the UDP port and IP protocol are also added. Step 3: Open "Control Panel → Administration Tools → Local Security Policy", then right-click on the "IP Security Policy," Manage IP Filters and IP Filters ", manage IP filters and IP filters Add a new filter rule to the list, name Enter "Prevent ICMP Attack", then press Add, select any IP address in the source address, the target address selects my IP address, the protocol type is ICMP, the setting is complete. Step 4: In "Manage Filter Actions", uncheck "Use Add Wizard", add, enter the name "DENY operation" in the regular, and the security measures are "blocked". In this way, we have a filtering policy that comes to enter ICMP packets and discards filtering of all packets. Step 5: Click on "IP Security Policy, in Local Machines", select "Create IP Security Policy - Next - Enter Name ICMP Filter", by adding the Filter Rule Wizard, specify the "Prevention ICMP Attack" filtering strategy for just defined Give the ICMP filter, then select "Deny's Actions" and right click to "prevent ICMP attack" and enable. After using security strategy, your computer is safe to prevent ICMP attacks and intrusion. It can intercept the large number of packets from those who have invaded, and ensure that your computer is from damage.
