Sybex CEH Certified Ethical Hacker Version 8 Study Guide

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388 Chapter 16 ■ Evading IDSs, Firewalls, and Honeypots 4. Perform a DoS. 5. Use code obfuscation. 6. Perform a false positive generation technique. 7. Attempt a Unicode attack. 8. Perform a fragmentation attack. It is important for you to remember that not every attack will work when testing a firewall or IDS, but you should still log the results and make note of the way the devices respond. When testing is completed, compare and analyze the results to see if you can determine any patterns or behavior that may indicate the nature of the environment or vulnerabilities present. Summary In this chapter we looked at firewalls, IDSs, and honeypots as mechanisms used to defend a network as well as something to evade as an attacker. You saw that the problem is that whereas many attacks are effective at getting information, they can be thwarted by using any of the systems we have covered. In fact, today’s networks and environments employ a range of defensive and detective measures designed to deal with such attacks. Today’s corporations use many defensive measures, each with its own way of putting a stop to attacks. Systems such as intrusion detection systems, intrusion prevention systems, firewalls, honeypots, and others form very potent adversaries and obstacles to your activities. Although these devices are formidable they are not insurmountable, so you must first learn how they work and then see what you can do to overcome the obstacles or just get around them altogether. Exam Essentials Understand the different types of firewalls. Know that not all firewalls are the same and that each operates a little differently. For example, packet filtering firewalls work at the network level and are commonly found embedded in routers, whereas stateful firewalls are devices unto themselves. Know the differences between HIDSs and NIDSs. Understand that an HIDS and an NIDS are not the same and do not monitor the same type of activity. An NIDS monitors traffic on a network, but diminishes in effectiveness where a host is concerned. An HIDS has diminishing capability outside of a specific host. Understand the role of a honeypot. A honeypot is a tool used to attract an attacker for the purpose of research, acting as a decoy, or to gain intelligence as to what types of attacks you may be facing and how well your defenses are working.
Review Questions 389 Review Questions 1. An HIDS is used to monitor activity on which of the following? A. Network B. Application C. Log file D. Host 2. Which of the following can be used to identify a firewall? A. Search engines B. E-mail C. Port scanning D. Google hacking 3. An NIDS is based on technology similar to which of the following: A. Packet sniffing B. Privilege escalation C. Enumeration D. Backdoor 4. Which of the following can be used to evade an IDS? A. Packet sniffing B. Port scanning C. Enumeration D. Encryption 5. Altering a checksum of a packet can be used to do what? A. Send an RST B. Send a URG C. Reset a connection D. Evade an NIDS 6. Firewalking is done to accomplish which of the following? A. Find the configuration of an NIDS B. Find the configuration of an HIDS C. Uncover a honeypot D. Analyze a firewall
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Senior Acquisitions Editor: Jeff Ke
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Acknowledgments First, I would like
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Contents at a Glance Introduction A
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xii Contents Chapter 3 Cryptography
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xiv Contents Commonly Exploited Ser
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xvi Contents Chapter 11 Denial of S
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xviii Contents Securing the Physica
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Introduction If you’re preparing
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Introduction xxiii How to Become a
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Introduction xxv Tips for Taking th
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Introduction xxvii 4. Answer all of
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Introduction xxix Network/wireless
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Assessment Test xxxi C. PPP D. SLIP
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Assessment Test xxxiii 19. An indiv
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Assessment Test xxxv 31. Which of t
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Answers to Assessment Test xxxvii 1
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CEHv8 Certified Ethical Hacker Vers
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In this book you will learn the var
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4 Chapter 1 ■ Getting Started wit
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10 Chapter 1 ■ Getting Started wi
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Every skill set comes with a histor
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28 Chapter 2 ■ System Fundamental
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This chapter covers cryptography, a
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58 Chapter 3 ■ Cryptography The p
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60 Chapter 3 ■ Cryptography ■
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62 Chapter 3 ■ Cryptography MARS
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64 Chapter 3 ■ Cryptography A has
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66 Chapter 3 ■ Cryptography The C
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68 Chapter 3 ■ Cryptography Under
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70 Chapter 3 ■ Cryptography TABLE
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72 Chapter 3 ■ Cryptography 5. On
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74 Chapter 3 ■ Cryptography PGP w
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76 Chapter 3 ■ Cryptography Revie
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78 Chapter 3 ■ Cryptography 13. W
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Chapter 4 Footprinting and Reconnai
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Understanding the Steps of Ethical
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What Is Footprinting? 85 Goals of t
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Terminology in Footprinting 87 Orga
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The Footprinting Process 89 Using S
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The Footprinting Process 91 Locatio
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The Footprinting Process 93 will no
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The Footprinting Process 95 In secu
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Exam Essentials 97 I want to introd
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Review Questions 99 7. Which of the
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Review Questions 101 19. Footprinti
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Once you’ve completed the footpri
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106 Chapter 5 ■ Scanning Networks
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You’ve gathered a lot of informat
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130 Chapter 6 ■ Enumeration of Se
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Using the information gathered so f
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154 Chapter 7 ■ Gaining Access to
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Chapter 8 Trojans, Viruses, Worms,
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Malware 181 In past decades, what w
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Malware 183 The Patriot Act This ac
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Malware 185 1. Design. The author e
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Malware 187 ■ ■ Macro viruses d
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Malware 189 How to Create a Virus C
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Malware 191 A Closer Look at Slamme
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Malware 193 ■ ■ Freeware—Down
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Malware 195 Operations that could b
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Malware 197 ■ NetMeeting Remote:
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Malware 199 Tools for Creating Troj
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Malware 201 5. In the next screen,
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Overt and Covert Channels 203 ■ P
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Exam Essentials 205 ■ ■ ■ ■
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Review Questions 207 7. Which utili
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Chapter 9 Sniffers CEH EXAM OBJECTI
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Understanding Sniffers 211 When on
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Using a Sniffer 213 In terms of LI,
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Using a Sniffer 215 2. Choose Captu
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Using a Sniffer 217 Table 9.1 lists
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Using a Sniffer 219 2. Next you nee
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Using a Sniffer 221 output from a s
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Using a Sniffer 223 3. Select the T
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Switched Network Sniffing 225 What
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Switched Network Sniffing 227 Port
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Switched Network Sniffing 229 root@
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Review Questions 231 Review Questio
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Review Questions 233 13. What is th
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Chapter 10 Social Engineering CEH E
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What Is Social Engineering? 237 If
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What Is Social Engineering? 239 eng
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What Is Social Networking? 241 Many
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What Is Social Networking? 243 Mist
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What Is Social Networking? 245 Ambe
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Commonly Employed Threats 247 Dumps
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Commonly Employed Threats 249 ■
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Identity Theft 251 Although some si
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Exam Essentials 253 Know about tech
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Review Questions 255 7. Phishing ca
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Review Questions 257 19. An attacke
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This chapter will give you a firm u
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262 Chapter 11 ■ Denial of Servic
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The concept of session hijacking is
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286 Chapter 12 ■ Session Hijackin
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Chapter 13 Web Servers and Web Appl
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Exploring the Client-Server Relatio
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Exam Essentials 323 Summary This ch
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Review Questions 325 7. In the fiel
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Review Questions 327 19. What may b
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This chapter covers SQL injection,
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332 Chapter 14 ■ SQL Injection SE
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334 Chapter 14 ■ SQL Injection Al
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336 Chapter 14 ■ SQL Injection Ru
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Page 437 and 438: Introducing Physical Security 395 O
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Page 458 and 459: 416 Appendix A ■ Answers to Revie
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438 Appendix B ■ About the Additi
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440 Appendix B ■ About the Additi
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442 ARP (Address Resolution Protoco
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444 Counter Mode with Cipher Block
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446 EIP (Extended Instruction Point
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448 Google Hacking Database (GHDB)
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450 IP DHCP Snooping feature - Limi
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452 mirrors, port - networks mirror
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454 passwords - ports passwords cha
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456 Remote Encrypted Callback Unix
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458 sniffers - stateful multilayer
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460 Teflon Oil Patch program - unpr
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462 webservers and web applications
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