IDS and IPS with Snort 3 : Get up and Running with Snort 3 and Discover Effective Solutions to Your Security Issues / Ashley Thomas.

Format:

Book

Author/Creator:

Thomas, Ashley, author.

Language:

English

Subjects (All):

Snort (Computer file).

Computer networks--Security measures.

Computer networks.

Computers--Access control.

Computers.

Computer security.

Physical Description:

1 online resource (256 pages)

Edition:

First edition.

Place of Publication:

Birmingham, England : Packt Publishing Ltd., [2024]

Biography/History:

Thomas Ashley: Ashley Thomas is a security researcher at Dell SecureWorks and a member of the Counter Threat Unit team. Before this role, he was instrumental in building the iSensor, a proprietary network intrusion prevention system. Ashley has a master's in computer networking from North Carolina State University, and he also holds several other certifications, including CISSP, GCIA, GREM, GCLD, and GWEB. He has authored several papers on intrusion detection and holds several patents in this field.

Summary:

Learn the essentials of Snort 3.0, including installation, configuration, system architecture, and tuning to develop effective intrusion detection and prevention solutions with this easy-to-follow guide Key Features Get to grips with the fundamentals of IDS/IPS and its role in network defense Explore the architecture and key components of Snort 3 and get the most out of them Migrate from Snort 2 to Snort 3 while seamlessly transferring configurations and signatures Purchase of the print or Kindle book includes a free PDF eBook Book Description Snort, an open source intrusion detection and prevention system (IDS/IPS), capable of real-time traffic analysis and packet logging, is regarded as the gold standard in IDS and IPS. The new version, Snort 3, is a major upgrade to the Snort IDS/IPS, featuring a new design and enhanced detection functionality, resulting in higher efficacy and improved performance, scalability, usability, and extensibility. Snort 3 is the latest version of Snort, with the current version at the time of writing being Snort v3.3.3. This book will help you understand the fundamentals of packet inspection in Snort and familiarize you with the various components of Snort. The chapters take you through the installation and configuration of Snort, focusing on helping you fine-tune your installation to optimize Snort performance. You'll get to grips with creating and modifying Snort rules, fine-tuning specific modules, deploying and configuring, as well as troubleshooting Snort. The examples in this book enable network administrators to understand the real-world application of Snort, while familiarizing them with the functionality and configuration aspects. By the end of this book, you'll be well-equipped to leverage Snort to improve the security posture of even the largest and most complex networks. What you will learn Understand the key changes in Snort 3 and troubleshoot common Snort 3 issues Explore the landscape of open source IDS/IPS solutions Write new Snort 3 signatures based on new threats and translate existing Snort 2 signatures to Snort 3 Write and optimize Snort 3 rules to detect and prevent a wide variety of threats Leverage OpenAppID for application detection and control Optimize Snort 3 for ideal detection rate, performance, and resource constraints Who this book is for This book is for network administrators, security administrators, security consultants, and other security professionals. Those using other IDSs will also gain from this book as it covers the basic inner workings of any IDS. Although there are no prerequisites, basic familiarity with Linux systems and knowledge of basic network packet analysis will be very helpful.

Contents:

Cover

Title Page

Copyright and Credits

Contributors

Table of Contents

Preface

Part 1: The Background

Chapter 1: Introduction to Intrusion Detection and Prevention

The need for information security

Defense-in-depth strategy

Firewalls (network and host layers)

Intrusion detection and prevention systems (network and host layers)

Endpoint detection and response (host layer)

Web application firewalls (network and host layers)

Mail security gateway (network)

Log management and monitoring (network and host)

The role of network IDS and IPS

Types of intrusion detection

Signature-based intrusion detection

Anomaly-based intrusion detection

Hybrid intrusion detection

The state of the art in IDS/IPS

Stateful analysis

Fast packet acquisition

Parallel processing

Pattern matching

Extending rule language

App and protocol identification

File analysis

IDS/IPS metrics

Detection accuracy

Performance-related IDS/IPS metrics

IDS/IPS evaluation and comparison

Evasions and attacks

IDS/IPS evasions

Attacks against the IDS/IPS

Summary

Chapter 2: The History and Evolution of Snort

The beginning of Snort

Snort 1 - key features and limitations

Snort 2 - key features, improvements, and limitations

Snort 2.9

The need for Snort 3

Part 2: Snort 3 - The New Horizon

Chapter 3: Snort 3 - System Architecture and Functionality

Design goals

High performance

Pluggable modular architecture

Configurability and customizability

Efficiency

Key components

DAQ module

Codecs

Inspectors

Detection or rule engine

Configuration module

Alerting and logging module

Snort 3 system architecture

Multithreading

Packet analysis flow within each Snort thread

Chapter 4: Installing Snort 3.

Choosing an OS for installing Snort 3

Snort 3 installation process

Preparing the system

Installing dependencies

Installing Snort 3

Installing Snort 3 on CentOS

Installing build tools

Installing Snort 3 on Kali (Debian)

Chapter 5: Configuring Snort 3

Configuring Snort 3 - how?

Command-line arguments

Configuration files

Configuring Snort 3 - what?

Configuring defaults

Configuring inspection

Configuring bindings

Configuring performance

Configuring detection

Configuring filters

Configuring output

Configuring your environment

HOME_NET

EXTERNAL_NET

HTTP_PORTS

The stream_tcp inspector

Optimal configuration and tuning

Managing multiple policies and configurations

Part 3: Snort 3 Packet Analysis

Chapter 6: Data Acquisition

The functionality of the DAQ layer

The performance of the DAQ Layer

Factors affecting packet capture performance

The consequence of packet capture performance degradation

Packet capture in Snort

Before DAQ

The DAQ module - introduced in Snort 2.9

The Snort 3 implementation of the DAQ layer

The DAQ library API

DAQ modules

Configuring DAQ

Chapter 7: Packet Decoding

OSI layering and packet structure

Data encapsulation and decapsulation

The role of packet decoding (Codecs)

Packet decoding in Snort 3

EthCodec - a layer 2 codec

IPv4Codec - a layer 3 codec

TcpCodec - a layer 4 codec

Code structure and other codecs

Chapter 8: Inspectors

The role of inspectors

Types of inspectors

Network inspectors

Service inspectors

Stream inspectors

Snort 3 inspectors

Service inspectors.

Stream inspectors

Wizard and binder inspectors

Chapter 9: Stream Inspectors

Relevant protocols for the stream inspector

IP

ICMP

TCP

UDP

Flow

The stream inspectors

stream_ip

stream_udp

stream_icmp

stream_tcp

stream_base

Chapter 10: HTTP Inspector

Basics of HTTP

HTTP request

HTTP response

HTTP/2

HTTP inspector

HTTP buffers

HTTP/2 inspector

HTTP inspector configuration

Chapter 11: DCE/RPC Inspectors

A DCE/RPC overview

Connectionless versus connection-oriented DCE/RPC

DCE/RPC inspectors

DCE/RPC rule options

Exercise

Chapter 12: IP Reputation

Background

IP address as an entity - use of blocklists

Challenges

History of IP blocking in Snort

Configuration of the IP reputation inspector module

Functionality of the IP reputation inspector

Data structure for storing IP reputation scores

IP reputation inspector - alerts and pegs

Part 4: Rules and Alerting

Chapter 13: Rules

Snort rule - the structure

Service rule

File rule

File identification rule

Rule header

Traditional rule header

Rule options

General rule options

Payload options

Non-payload options

Recommendations for writing good rules

Using fast_pattern wisely

Using the inspection buffers for rule matching

Defining the right service or protocol

Chapter 14: Alert Subsystem

Post-inspection processing

Event generation

Event thresholding

Applying a rule action to a packet

Logging the alert

Alert formats

CSV format

Unified2 format

Alert Fast format

Alert Full format

JSON format

Chapter 15: OpenAppID

The OpenAppID feature

Design and architecture

Detectors

The inspector

The rules

Summary.

Chapter 16: Miscellaneous Topics on Snort 3

Snort 2 to Snort 3 migration

Migrating the rules

Migrating configurations

Troubleshooting Snort 3

Why is the Snort rule for XYZ not alerting?

Snort is crashing!

Help! Got support?

Index

Other Books You May Enjoy.

Notes:

Includes index.

Description based on publisher supplied metadata and other sources.

Description based on print version record.

ISBN:

9781800569423

1800569424

OCLC:

1455105279