Securing Wireless Mesh Network with Mobile Firewall

With regard to the security problems in Wireless Mesh Networks, researches have mainly focused on Intrusion Prevention and Intrusion Detection methods. However, as the only method which can eliminate the malicious node thoroughly from the WMNs, Intrusion Response has not been paid enough attention. Traditional Intrusion Response method like Flooding Broadcast can effectively secure the MANET because of its limited scale and high dynamic. However, in a large-scale WMN, such method is infeasible and inappropriate because of large amounts of overheads and huge influence to the network. In this paper, we utilize the denseness of WMNs and propose an overhead-localized Intrusion Response mechanism which we call Mobile Firewall. It is both suitable and efficient to the WMN, as it localizes the packet overheads in prealarming other nodes as well as successfully defenses against the malicious node.