How to prevent ARP attacks

　1, ARP attacks through the forgery of IP address and MAC address to achieve ARP spoofing, the network can generate a large number of ARP traffic to make the network blocked, the attacker as long as the continuous issue of fake ARP response package can change the target host ARP cache IP-MAC entries, Cause network disruption.

　　2, ARP attacks are mainly in the LAN network, if there is a person infected with the ARP Trojan, the system will be infected with the ARP Trojan would try to "ARP spoofing" means to intercept other computers in the network communication information, and therefore the network of other computer communication failures. the Trojan attack in addition to the same LAN will lead to other users on the Internet appear when the phenomenon of intermittent, but also steal user password.

　　3, Arp cheat Trojan poisoning phenomenon is: use the LAN will suddenly drop line, after a period of time will return to normal. For example, client state frequently turn red, users frequently break the network, ie browser frequent errors, as well as some common software failures.

　　4, the best way to prevent ARP attacks is to install a simple and strong firewall, such as a very famous, and 100% free Comodo firewall. See figure below:

5, Comodo Firewall installation is very simple, only need to click "Next" to complete the installation, after the installation, we also need to do some configuration, click on the interface of the "Firewall" button, see the following figure:

6, Next Click "Firewall Behavior Settings"-"Advanced settings", check "protect ARP cache", see the following figure:

7, click "OK", you can effectively defend the ARP attack.