June 1, 2019 Thesis Open Access

MULATU MEKONNEN

DCAT Export

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    <dct:title>Internet Protocol (IP)-Based Distributed Denial of Server (DDoS) Attack Detection and Mitigation for Software Defined Networking (SDN) Controller</dct:title>
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    <dct:description>&lt;p&gt;Software-defined networking architectural framework eases the life of the network&lt;br&gt; administrators by isolating the data plane from the control plane. This facilitates&lt;br&gt; easy configuration of the network, provides a programmable interface for developing&lt;br&gt; applications related to management, security, logging etc. and the centralized logical&lt;br&gt; controller gives more control over the entire network, which has the total visibility&lt;br&gt; of the network.&lt;br&gt; These advantages of SDN also expose the network to the vulnerabilities and the&lt;br&gt; impact of the attacks are much severe when compared to conventional networks,&lt;br&gt; where the network devices in itself provided protection from the attacks and limits&lt;br&gt; the scope of the attacks.&lt;br&gt; In this paper, we explore various attacks that can be launched on SDN at different&lt;br&gt; layers. We also evaluate some of the existing security methods in mitigating the&lt;br&gt; attacks. We also explore a possible solution to prevent DDoS attacks using entropy.&lt;br&gt; A Distributed Denial of Service (DDoS) attack is a DoS attack utilizing multiple&lt;br&gt; distributed attack sources. Every network in the system has an entropy. Increase&lt;br&gt; in randomness causes decrease in entropy. To mitigate this threat, this project&lt;br&gt; proposes to use the central control of SDN for attack detection and introduces a&lt;br&gt; solution that is effective and lightweight in terms of the resources that it uses.&lt;br&gt; More precisely, this project shows how DDoS attacks can exhaust controller resources&lt;br&gt; and provides a solution to detect such attacks based on the entropy variation of&lt;br&gt; the destination IP address. Based on this value if it drops below threshold , we are&lt;br&gt; blocking the specific port in the switch and bring the port down. This method is able&lt;br&gt; to detect DDoS within the first five hundred packets of the attack traffic&lt;/p&gt;</dct:description>
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