Design of Defense Algorithm Concerning Arp Attack on Campus Network

Since some security flaws exist in the arp protocol, some network attacks may arise such as arp overflow, arp spoofing and so on. By analyzing the modes of arp attack on campus network, the paper puts forward a defense algorithm against the arp attack. In the algorithm, the arp packets sent and receive by the host computer are to be detected ,and those differing ones are abandoned; In accordance with the policy of “receiving arp response after sending an arp request ”checks the arp response packets, those no-request ones are refused. The above defense algorithm can effectively prevent arp attacks, which can be applied in the campus network with high-safety requirements.