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Assignment: DDoS
ជុនសុខជ'()ព វសន'-៉)ត ចិ2)'3ឿង សុភព'អង ស9:)ត'
!កុមទ ី៤
Lecturer: Ou Phannarith
-‐Internet Control Message Protocol (ICMP) flood -‐(S)SYN flood -‐Teardrop a:acks -‐Peer-‐to-‐peer a:acks -‐Asymmetry of resource uAlizaAon in starvaAon a:acks -‐Permanent denial-‐of-‐service a:acks -‐ApplicaAon-‐level floods -‐Nuke -‐HTTP POST DDOS a:ack -‐R-‐U-‐Dead-‐Yet? (RUDY) -‐Slow Read a:ack -‐Distributed a:ack .........................................................
ករវយលុកDDoSមន*+ើន-+បដូចជ3
œហœយ,រ.យលុកែដលេបញនិយមបំផុត:;ះគឺ៖ denial-‐of-‐service (DoS) ឬក៏ distributed denial-‐of-‐service (DDoS) .B,រœធDœឱFUser មិនGចIញយក network resource ឬមិនGចIក់ទងBមួយServerMនឬœធDœឱFNetworkNំងមិនGចដំœណœរ,រMនែតមPង។
វ"្ើរ(Request) Resourceជ'(ើនដងក្-ង.(លកំណត់ណមួយក្-ង8លបំណង:្ើឱ(=Networkគំងជប?@(ះអសន្(Unavailable) D(លបណ@(លឱ(=Userមិនអច
ទញResourceពីserverឬNetworkបន។N
ករវយលុកQ(បDDosR(ះអចS(តិបតិ្ករUយមនុស(V ពីនក់ ឬ'(ើនជងR(ះ ឬក៏Uយ Bots (កំុព(=Yទ័រ\(V(ងD(ល](^វបនមនុស(Vមa(ក់b(ប់b(ង Computer Zombie)។
ភគ'(ើនe(f(ើDDosgើម(hីវយលុកWebsiteណមួយក្-ងបំណង:្ើឱ(=អជីវកម្k(ុមហ៊ុនណមួយមនបno(។
a new generaAon of DDoS a:acks
ករករពរNetworkពីDos Attack&Cisco Protec>on in an ISP Environment. Traffic Des>ned for Targeted Device Is Diverted to Cisco Guard XTs; Clean Traffic Is Returned to the System.
Cisco Protec>on in an Enterprise Environment. Only Traffic Des>ned for the Targeted Device Is Diverted to the Cisco Guard XT, Which Returns "Clean" Transac>ons Back to
the System.
Defense.Net DDoS Frontline
h:p://www.defense.net/ddos-‐protecAon-‐service-‐frontline.html
សូមអគុណ3