Software Defined Networking (SDN) has many advantages over a traditional network. The great advantage of SDN is that the network control is physically separated from forwarding devices. SDN can solve many security issues of a legacy network. Nevertheless, SDN has many security vulnerabilities. The biggest issue of SDN vulnerabilities is Distributed Denial of Service (DDoS) attack. The DDoS attack on SDN becomes an important problem, and varieties of methods had been applied for detection and mitigation purposes. The objectives of this paper are to propose a detection method of DDoS attacks by using SDN based technique that will disturb the legitimate user's activities at the minimum and to propose Advanced Support Vector Machine (ASVM) technique as an enhancement of existing Support Vector Machine (SVM) algorithm to detect DDoS attacks. ASVM technique is a multiclass classification method consisting of three classes. In this paper, we can successfully detect two types of flooding-based DDoS attacks. Our detection technique can reduce the training time as well as the testing time by using two key features, namely, the volumetric and the asymmetric features. We evaluate the results by measuring a false alarm rate, a detection rate, and accuracy. The detection accuracy of our detection technique is approximately 97% with the fastest training time and testing time.
Web-based session mobility system is capability of moving HTTP session from one device to another device without interrupted and seamless web access, User may be continue using web applications at the same point on a new device without re-login or re-type any information. Web application working on HTTP is stateless protocol. A number of approaches to track web application sessions were presented, for example server-based, proxy-based and client-base. In our recently work we have proposed Web-based session mobility using SIP (Session Initiation Protocol). . In this mechanism SIP URL is used instead of IP address of the destination device. This will allow more flexible of finding a target device to move on. By using SIP, we have shown some significant advantages over other schemes, e.g. more benefits, and yet, more simplicity. Moreover, most benefits hold by SIP can be achieved, e.g. present service, call forwarding, call parking. This makes our proposed mechanism more attractive. We have shown how to implement web-based session mobility in real world. In this paper, we have proposed some enhancements of web session mobility based on SIP.
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