Book Image

CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003 - Third Edition

By : Jeff T. Parker, Michael Gregg
Book Image

CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003 - Third Edition

By: Jeff T. Parker, Michael Gregg

Overview of this book

The next few years will bring a 45-fold increase in digital data and at least one-third of that data will pass through the cloud. The level of risk to data everywhere is growing in parallel and organizations are in need of qualified data security professionals to safeguard their information. The CASP+ certification validates this in-demand skillset and this book is your ideal resource for passing the exam. CASP+ meets the ISO 17024 standard and is approved by the U.S. Department of Defense to fulfill Directive 8570.01-M requirements. It is also compliant with government regulations under the Federal Information Security Management Act (FISMA). As such, this career-building credential makes you in demand in the marketplace and shows that you are qualified to address enterprise-level security concerns. The CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003, Third Edition, is the preparation resource you need to take the next big step for your career and pass with flying colors. This book provides detailed explanations of technical and business concepts that give you the background you need to apply, identify, and implement appropriate security solutions. You’ll solidify your understanding of each objective with end-of-chapter reviews. The book contains hands-on lab exercises and hundreds of practice questions to help you test your knowledge in advance of the exam. By the end of the book, you’ll have the knowledge and the confidence to ace the CASP+ certification exam.
Table of Contents (22 chapters)
Free Chapter
1
Cover
2
Acknowledgments
3
About the Authors
4
Table of Exercises
6
Assessment Test
7
Answers to Assessment Test
18
Index
19
Advert
20
End User License Agreement

Host-Based Firewalls

Now that we have reviewed firewalls, let’s turn our attention to host-based firewalls. Firewalls are usually set at the demarcation line between trusted and untrusted network elements, but they can also be placed on a host system. Host-based firewalls are devices that run directly on a network host or device. A host-based firewall is deployed for the purpose of protecting the device on which it’s installed from an attack. A host-based firewall usually has predefined rules to protect the host against specific attack patterns. Host-based firewalls can be used with quarantine and remediation. Some host-based firewalls can also prevent malicious software from attacking other devices on a network. Adding a host-based firewall builds on the concept of defense in depth. An example of this concept is shown in Figure 4.3.

Diagram shows network of E-commerce, web server, web application firewall, L A N switch 1, L A N switch 2, trusted zone, I D S sensor, firewall, router gateway, internet, and several units.

FIGURE 4.3 Defense in depth and multiple layers of protection

Host-based firewalls work by inspecting and controlling inbound and outbound...