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Message: <blockquote data-quote="shan5dx" data-source="post: 4615723" data-attributes="member: 54642">Denial Of Service (DoS) Attacks6) UDP - Flood Attack :- Two UDP services: echo (which echos back any character received) and chargen (which generates character) were used in the past for network testing and are enabled by default on most systems. These services can be used to launch a DOS by connecting the chargen to echo ports on the same or another machine and generating large amounts of network traffic.7) Distributed Denial Of Service (DDoS) :- In Distributed DoS attack, there are 100 or more different attackers (systems) attacking the single system. Due to higher number of attackers DDoS attack is more effective and dangerous than regular DoS attack. The attackers have control over master zombies, which, in turn, have control over slave zombies, as shown in figure.<img src="http://www.insecure.in/images/ddos.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" />No system connected to the internet is safe from DDoS attacks. All platforms, including Unix and Windows NT, are vulnerable to such attacks. Even Mac OS machines have been used to conduct DDoS attacks.The most popular DDoS tools are:-a) Trin00 (WinTrinoo)b) Tribe Flood Network (TFN) (TFN2k)c) Shaftd) Stacheldrahte) MStream</blockquote>

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