The packets in a mobile wireless ad-hoc network (MANET) are vulnerable to various packet-dropping attacks. Due to the lack of a centralized monitoring mechanism, it is a challenging problem to identify the attackers that launch the packet-dropping attacks in MANET. The existing DoS defensive techniques have not provided a scheme to efficiently and effectively solve this challenging problem. Hen...

There has been an explosion of cloud services as organizations take advantage their continuity, predictability, well quality service and it raises the concern about latency, energy-efficiency, security. This increase in demand requires new configurations networks, products, operators. For this purpose, software-defined network is efficient technology that enables to support future functions alo...

With more and more hosts being connected to the Internet, the importance of securing connected networks has increased, too. One mechanism to provide enhanced security for a network is to filter out potentially malicious network packets. Firewalls are designed to provide “policy-based” network filtering. A firewall may consist of several components. Its key component is usually a packet filter. ...

Enhancement the Performance of MANET (Mobile Ad-hoc Network) using spatial d iversity. Spatial d iversity implemented using cooperative transmission technique in Medium access control (MAC) layer level protocol. In noisy environment limit the network performance like coverage area, limit number of node, degrade packet transmission rate, increase packet loss rate etc. In this paper enhance the s...

In this paper, we consider the problem of detecting an intruding packet in a communication network. Detection is accomplished by sampling a portion of the packets transiting selected network links (or router interfaces). Since sampling entails incurring network costs for real-time packet sampling and packet examination hardware, we would like to develop a network packet sampling strategy to eff...

The BSD/OS IPFW packet filtering system is a well engineered, flexible kernel framework for filtering (accepting, rejecting, logging, or modifying) IP packets. IPFW uses the well understood, widely available Berkeley Packet Filter (BPF) system as the basis of its packet matching abilities, and extends BPF in several straightforward areas. Since the first implementation of IPFW, the system has b...