Design of Distributed Cloud Server for Preventing DDOS Attacks

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1 Design of Distributed Cloud Server for Preventing DDOS Attacks V.Naveenraj 1, G.Sekar 2 1 M.Phil. Research Scholar, PG & Research Department of Computer Science, Dr. Ambedkar Govt. Arts College, Vyasarpadi, Chennai, India 2 Assistant Professor, PG & Research Department of Computer Science, Dr. Ambedkar Govt. Arts College, Vyasarpadi, Chennai, India Abstract Cloud encompasses diverse models and technologies. Many of the applications interface with the user via the Web. All the normal security vulnerabilities are just as relevant to applications running on the cloud as they are to applications running on conventional hosting. Another type of security issues related with Physical security where data center to be physically secure against unauthorized access or potential natural disasters.in this paper we discuss about security issues on the cloud especially the DDOS attacks. The distributed environment is prone to more attacks. The DDOS attacks are done by the hacker with help of command prompt or DOS or Linux terminals. The maximum number of attacks in the distributed environment in DDOS attacks. Keywords DDOS Attacks, Security Issues, cloud computing I. INTRODUCTION Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. Cloud computing is defined as shared the computing resources without a local server in a personal computer to work an application. Cloud computing is a type of internet based computing. Where the services are storage, servers, application, etc,. The service delivered based onto the organization s computer and peripherals through the internet Main goal of the cloud concerns high performed computing and consumer oriented application provided like spread sheet, presentation, etc. to provide personalized information and data storage. Standards of cloud told that the cloud is connecting computers and needs based on that the cloud going to be made. Many business peoples they are using cloud because of cheaper on buying an original application. Comparatively it leads qualities of fast and easier maintenance. Other than people they use cloud service like Google docs, mails, drive and more to access they need upon. In any place they handle the files and create. In many people had uses on cloud service. And more number of cloud provider give free software, storage, infrastructure, etc,. We can able access our file throughout world in via internet. There are three types of cloud available as shown in the Fig 1. Public cloud: Public cloud provides the services are data storage, servers, and application. The public cloud can free for companies to use an application, storage, and infrastructure. These clouds are more scalable, accessible, public cloud may be pay-as-youfees or fixed month fees for service utilize. Private cloud: Private cloud is distinct and secure environment for specific client to operate the cloud. The cloud operates by the single organization and greater control over them. It has individual Local access networks. Benefits of private clouds are higher security, performance, More Control, cost efficiency, improved reliability, and energy efficiency. Hybrid cloud: cloud services utilize both public and private cloud to perform functions within the individual organization. Some of that payable and some of that free for cloud services. Organization services maintain by the organization other than that maintain by the cloud service provider.in that case they provide among the services are called as as-aservice. For example: platform-as-a -service, Infrastructure-as-a-service, storage-as-a-service, etc. II. Fig 1. Types of Cloud CLOUD SECURITY CHALLENGES The security risks for cloud computing providerswill be equivalent to the traditional application likeproviding strongsecurity fenceby expelling the bad factors out [10]. To extract the functionalities of virtualization and virtual machines International Journal of Computing Algorithm (IJCOA) 1320

2 from multiple organizations, the cloud service providers have to be co-located on the same physical resources. The following parametershave to be kindly considered by the providers while deploying the cloud environment [12]. A. ADMINISTRATIVE ACCESS TO SERVERS AND APPLICATIONS One of the most important properties of cloud computing is the self accessing of cloud documents via internet. In a traditional company server, each user can be authorized internally but in cloud, since the access is open to lot of people, employment of administrative access to the servers data is somewhat hard to implement. B. DYNAMIC VIRTUAL MACHINES A Virtual Machine (VM) can be easily roll backed to the previous state, restarted, stopped since they are dynamic in nature. VMs can also be cloned and moved between physical servers. But this dynamic nature of virtual machine becomes a bottleneck for security.sometimes the errors may be propagated to the entire network so that other may know the current configuration which should kept confidential. It is also hard to maintain a log about the status of virtual machine. C. VULNERABILITY EXPLOITS AND VM-TO-VM ATTACKS Like localized virtual machines and servers, Cloud servers make use of same operating systems and web applications.so an important threat to cloud environment is the ability for an attacker to exploit vulnerabilities inthese systems and applications. The co-located virtual machines will increase the scope of attack. So there becomes a need for the transparent prevention systems tofind out malicious activity at the virtual-machine level irrespective of its location [10]. D. SECURING DORMANT VIRTUAL MACHINES Even though the status of a virtual machine is offline, it is still available to the applications unlike a physical machine, so that its storage is accessed by the third party.in addition to that an inactive virtual machine is unable to run anti-attack scan software. So the cloud service provider must ensure a security mechanism to establish a dormant virtual machine to be 100% dormant i.e. not responding to any request. E. PERFORMANCE IMPACT OF TRADITIONAL SECURITY The security solutions in practice were formulated prior to the concept of x86 virtualization and so they cannot be applicable to current cloud virtualization. Since virtual machines share resources among a large set of users, the scan of the system before sharing surely takes more time and thus decreases the system performance. Cloud service providers have to address this performance degradation problem by providing fastest scans at the hypervisor level and eliminating at the host level. F. DATA INTEGRITY: CO-LOCATION, COMPROMISE AND THEFT According to the Data Breach Report given by Verizon Business Risk Team in 2009, 64% of data are lostby hackingand intrusions.the areas of attack in cloudenvironments would be more and hence increases the rate of risks also.the companies expect that cloud service providers have to give the assurance that an auditable proof should be given to them so that the cloud resources will not be tampered from shared physical infrastructure [13]. It requires regular monitoring of operating system and application filesand activities. G. PATCH MANAGEMENT Once a company has enrolled themselves in cloud environment, from that time the patch management for the hosted web server will be in the hands of the provider and not in the hands of the company. This self-service cloud server patch management will also be a hurdle for security data.the previously mentioned Data Breach Report of 2009 also state that companies using cloud computing will have to vigilantly watch the cloud resources status for patches. H. POLICY AND COMPLIANCE Enterprises are in the situations to prove themselves for compliance with security standards like PCI, HIPAA, GLBA, SAS70 and ISOabout the location of systems, virtualization mechanisms, oncampus or off-campus virtual machines etc. I. PERIMETER PROTECTION AND ZONING The enterprise perimeter also has an impact over the security of cloud data. So the foundation for establishing security of networks, the firewall,can be formulated in such a way that the third party could not reach cloud servers or its policies. As a result,the virtual machines should be designed as self-defending machines. III. SECURITY ISSUES Most of the security issues are fallen in the public cloud as the environment is shared by different types of users and organizations. Security issues on the cloud are tractable because the concerns that arise a stem from the lack of making, lack of information[14]. The attackers they had advantage from that. Common types of attacks 1. DDOS Attacks 2. Malware-Injection Attacks 3. Side Channel Attacks 4. Authentication Attacks A. DDOS ATTACKS: This type of attack is targeting connected or tangible system. The attackers receive configuration International Journal of Computing Algorithm (IJCOA) 1321

3 information. They try to get accessing the server and handle the resources and trigger information [19]. The flood of incoming message forces the system to shutdown [1]. B. MALWARE-INJECTION ATTACKS: The kind of attack is injecting the malware into the server. Ultimate target is injecting the malicious code into the web application. Malware reduces the speed, performance, storage. It leads to hang the server[3,5]. C. SIDE CHANNEL ATTACKS : The attackers encrypt the retrieval information and get the personal information at the time of send and receiving in the server. That may be encryptingcipertext to plain text. Time is important factor in this attack. Send or receive at time of data at only possible [3][11]. D. AUTHENTICATION ATTACKS: It s one of the frequently doing attacks. This may happen on security faults under the authentication system. There are so many ways to attack the authentication system. It happened on the virtual servers. The DDOS attack covers the large class of malicious attacks on the network or internet infrastructure. In this problem how it happen.the figure 3 shows distributed structure of the cloud. When the server region all of them have administrative rights. When the hackers with help that of command prompt to identify the cloud IP Address (IPV4 Address) and sending flood and where they also have access of the file and server details make use them send malicious to server or interrupt server they restart them. It mostly happens on the cloud service providers misunderstanding and laziness. More number of hacking tools available for crash the network in market. They frequently delete important information. Some time the web makers use code or language it happen. Incident of Amazon EC2 server, the code will help us to find the root directory and IP Details. There is problem in the programming tool. All users account details stored under the root directory. The Sweden hacker hacked and send the Report on the Amazon sever. They check what happened on that they found that Programming tool PHP had the mistake on the version of before and before of IV. DDOS ATTACKS IN CLOUD Cloud providers facing more numbers of DDOS Attacks year wise and they are in increasing manner [15]. Most of private and public cloud providers suffer the DDOS attacks. The Arbor networks release security report that told that 76% of attacks happened under the DDOS attacks in security issues. In the report have 43% of attacks on infrastructure security issues. On most important factor some concern have deal only 14% of respondents had seen attacks targeting any form of cloud service. Data centers are attacked by 94% [8]. Fig 2. Attack types distribution Sony pictures are supposed to have conducted a retaliatory DDOS Attacks against the network. They leak information for public download, according to media report. The network punctuated by extortion demands, as well the theft and releases the personal information, s and others. They named upon that Guardians of Peace [7]. Fig3. Distributed structure of Cloud The DDOS attack works on the application layer [3] and ports helps us to find the IP. The ports are TCP22 and These ports are administrative ports. SSH runs by default port on the TCP 22. But, actual port of TCP 22 is port 5632.client use random ports to connect to the port TCP 22 they trying to log on to that server. This port is default port for some of pcanywhere services. UDP packets [2] sent to this port generally for pcanywhere. The value 0x0016 is hexadecimal form TCP22. The port 3389 used for Remote desktop, terminal services, windows 2000 terminal server, Microsoft International Journal of Computing Algorithm (IJCOA) 1322

4 remote display protocol, Ms Terminal services, MS WBT Server. This port is vulnerable to denial of service against windows network terminal server. The hacker quickly causes a server to reach full memory utilization by creating a large number of normal TCP connections to port Vulnerability exists on the RDP. Where, the hacker sends a specially crafted sequence of packets to port TCP V. TYPES OF DDOS ATTACKS A. SYN FLOOD ATTACK: TCP SYN flood is a one of the type of Distributed Denial of Service (DDoS) attack that exploresthe part of the normal TCP three-way handshake to consume resources on the targeted server and render it unresponsive [16,18]. B. SMURF ATTACK: Smurf attacks can be devastating, both to the victim networkand to the network(s) used to amplify the attack. An Internet control Message Protocol (ICMP) Smurf attack is a brute-force attack on the direct broadcast feature that is built in to the IP protocol [17]. C. PING OF DEATH: A ping of death involves sending malware to the server. A ping normally 32 bytes sized. This attack caused by sending an IP Packet above sized bytes allowed by IP Protocol. The operating doesn t know heavy size of packets. So, they crashed, ceased or freeze. D. LAND ATTACK: It consists of stream of TCP SYN packets send by same name IP address and port number of server. Service providers can able to block these attacks. VI. SOLUTION FOR THE DDOS ATTACKS In the Figure 3,set of level 2 servers available in the layer 2 has administrative rights and they are connected with the main server. Request attending server is having administrative rights. So, that we are giving limit access to level 2 server. To restrict the client by accessing information we are using group policy on that severs. To create the GPO from the Group policy reporting Firewall ports. Select the group policy reporting firewall ports started GPO from the source starter GPO. Create new GPO. Under mention the ports don t give any access right to the client. Here all the administrative ports mentioned. Starter GPO s and create GPO s Folder linked in the group policy object [6]. In that case level 2 servers don t have rights do any process of the server. So, level 2 servers wants to access storage file and authentication details, needs software that do the process of administrative access transaction. Software checks the authorized person to use them. The software have trip password and have session to idle time. Trip password generated by the server when approached level2 server. Time duration of password expired on 1 minute. When they session ended on idle 5 minutes. When they doing coping files and do other activities of a server. SOME ABBREVATIONS: DOS Denial Of Service DDOS Distributed Denial Of Service TCP Transmission Control Protocol GPO Group Policy Object EC2 Elastic Cloud 2 RDP Remote Desktop Protocol SSH Secure Shell VII. CONCLUSION Cloud computing is recent emerged technology that has revolutionized the storage of large volume of data. Security issues are the major challenging issue in Cloud computing. Various data security risk factors are discussed in the above section Examining the major Security challenges for cloud providers and their clients, and further my paper be extended by guidelines for the implementation of data security controls that are based on recognized security frameworks and industry best practices. REFERENCES [1] Alina Madalina Lonea, Daniela Elena Popescu, Huaglory Tianfield, Detecting DDoS Attacks in Cloud Computing Environment, "Politehnica" University of Timisoara, INTJCC, pp.70-78, February, [2] Upma Goyal, Gayatri Bhatti and Sandeep Mehmi, A Dual Mechanism for defeating DDoS Attacks in Cloud Computing Model Computer Science Department, Punjab Technical University, Kapurthala, India, vol. 2, Issue 3, pp 34-39, March [3] Ajey Singh, Dr. Maneesh Shrivastava, Overview of Attacks on Cloud Computing, IJEIT, Volume 1, Issue 4, April 2012 [4] Vikas Chouhan, Sateesh Kumar Peddoju, Packet Monitoring Approach to Prevent DDoS Attack in Cloud Computing, Electronics & Computer Engineering Department,Indian Institute of Technology Roorkee, Vol-1 Iss-1, 2012 [5] Poonam Yadav, Sujatha, Security Issues in Cloud Computing Solution of DDOS and Introducing Two-Tier CAPTCHA, Software Engineering Department, ITMU gurgaon, Haryana, IJCCSA, Vol.3, No.3, June 2013 [6] https://technet.microsoft.com/en-in/library/jj aspx [7] [8] [9] Wayne Jansen, Timothy Grance Guidelines on Security and Privacy in Public Cloud Computing, NIST, Jan [10] Making Virtual Machines Cloud-Ready, A Trend Micro White Paper May [11] BhruguSevak, Security against side channel attack in cloud computing, IJEAT, Volume 1, Issue-2, December [12] Kuyoro s.o, Ibikunle f.,awodele o., Cloud Computing Security Issues and Challenges, IJCN, Volume 3, Issue-5, 2011 International Journal of Computing Algorithm (IJCOA) 1323

5 [13] Osama Harfoushi, Badder Alfawwaz, Nazeeh a.ghatesheh, Data Security and Challenges in Cloud Computing : A Conceptual Analysis and Review, Department of Computer informatin system,communication and network,2014, 6,15-21,http://www.scirp.org/journal/cn [14] Prince Jain, Security Issues and their Solution In Cloud Computing, IJCBR, Proceddings of I- Society [15] Mohammed Nazri, Abdulaziz Aborujilah, New Framework To Detect And Prevent Denial Of Service Attack In Cloud Computing Environment, MIT, IJCSS, Volume -6, Issue-4. [16] Niraj Suresh Katkamwar, Atharva Girish Puranik, Securing Cloud Servers Against Flooding Based DDOS Attacks, IJAIEM, volume- 1, issue-3, Nov [17] Akash Mittal, Prof. Ajith Kumar Shrivastava, A Review Of DDOS Attacks and its Counter Measures In TCP BasedNetworks, Department of computer science, IJCSES, Volume -2, Issue-4, Nov [18] Esraa Alomari, SelvaKumar Manickam, Botnet- Based Distributed Denial of Service Attacks on Web Servers, IJCA, Volume-49, issues-7, July [19] J.RameshBabu, B.SamBalaji, A Prevention Of DDOS Attacks In Cloud Using NEIF Techniques., IJSRP, Volume- 4, Issue-4, April International Journal of Computing Algorithm (IJCOA) 1324

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