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A SURVEY OF SECURING NETWORKS USING

SOFTWARE DEFINED NETWORKING

ABSTRACT

            Computer networks typically interconnect hosts using network switches and routers which provide data packet forwarding and routing functionality. Switches transfer data among nodes on the same local area network (LAN) segment, whereas routers function as gateways enabling the routing of packets between hosts in different networks. These forwarding devices usually run proprietary operating systems and vendor-specific protocols that have to be configured through a process in which network operators translate high-level network policies into device-specific low-level commands, and often manually input these commands using command- line or graphical user interfaces. Scripts and tools significantly reduce the operational workload and errors in the configuration process, but this approach still requires network administrators to reason carefully about the network, and finds the right balance between the use of automation, the situation requirements, and the changing state of the network. As a network security system refers to the Software Defined Networking (SDN) is rapidly emerging as a new paradigm for managing and controlling the operation of networks ranging from the data center to the core, enterprise, and home. The logical centralization of network intelligence presents exciting challenges and opportunities to enhance security in such networks, including new ways to prevent, detect, and react to threats, as well as innovative security services and applications that are built upon SDN capabilities. In this paper, we undertake a comprehensive survey of recent works that apply SDN to security, and identify promising future directions that can be addressed by such research.

EXISTING SYSTEM	PROPOSED SYSTEM
EXISTING CONCEPT:- In Existing approaches to reclaim anonymity, Such as Onion routing overlays (e.g. ToR and Tarzan) are inefficient, and have significant latency issues. Existing Research in wireless sensor networks may prove useful. An illuminating example is that of Sizzle.	PROPOSED CONCEPT:- The proposed approaches the Researchers have proposed that specialized middle boxes be defined entirely as virtualized software modules, and managed via standardized, open APIs. Proposed is an application development Framework facilitating the design of sophisticated threat detection and mitigation modules.
EXISTING ALGORITHM:- Privacy preserving algorithms	PROPOSED ALGORITHM:- Anomaly detection algorithms
ALGORITHM  DEFNITION:- Furthermore, the user may locally deploy privacy preserving algorithms to screen sensitive data before the results are uploaded to a central server.	ALGORITHM  DEFNITION:- To protect user privacy, the author makes the following recommendations. First, he proposes that ISPs or home users obfuscate IP addresses in flow statistics. Second, he suggests that anomaly detection algorithms process aggregate data using IP prefixes rather than individual IP addresses.
DRAWBACKS:- Not so efficient if there is heavy interaction between branches Data should be carefully maintained.	ADVANTAGES:- This technique is very efficient if there is heavy interaction between branches. We can store the data normally and efficiently.