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