tailieunhanh - Module 14 Denial of Service

Một cuộc tấn công từ chối dịch vụ (tấn công DoS - Viết tắt của Denial of Service) hay tấn công từ chối dịch vụ phân tán (tấn công DDoS - Viết tắt của Distributed Denial of Service) là sự cố gắng làm cho tài nguyên của một máy tính không thể sử dụng được nhằm vào những người dùng của nó. | IM Ethical Hacking and Countermeasures Version 6 CEH Module XIV Denial of Service Certified Ethical Hacker TM c EH Scenario Certified Ethical Hacker Henderson an investigative journalist in the field of Information Security sets up a new security portal called HackzXposed4u . This portal claims to expose the activities and identities of all known hackers across the globe. He plans a worldwide launch on 28th March. The portal receives a wide media coverage before its release as this was one of its kind in the world. Within five minutes of the official launch of the portal the server crashes thus putting hold to Henderson s plans. What could be the reason for the mishap Why would anyone want to sabotage the portal EC-Council Copyright by Ec-Council All Rights Reserved. Reproduction is Strictly Prohibited TM c E H News Certified Ethical Hacker PC World Botnets Trump Denial of Service Attacks A survey shows that malware-infected botnet PCs have overtaken denial-of-service attacks as the top security issue facing Internet service providers and others. Matt Hines Computeiworld Tuesday September 1 8 2007 02 00 PM PDT Malware-infected botnet PCs have overtaken denial-of-service attacks as the top security issue facing Internet service providers and other Web infrastructure hosting players according to a new survey of the organizations. Arbor Networks published the results of its third-annual Infrastructure Security Report on Monday-- a survey of 75 large ISPs hosting companies and other providers -- which found for the first time that botnets currently outrank DoS threats as the most serious concern forthe firms. Tens of millions of PCs are likely infected with botnet programs worldwide according to survey results and Arbor researchers said the ISPs they questioned admitted to spending more time and resources battling botnets than ever before. Infrastructure providers are finding botnets hard to pin down as the people responsible for controlling the zombie machines are .