Network Scanning Cookbook

By : Jetty

Buy this Book

Network Scanning Cookbook

By: Jetty

Buy this Book

Overview of this book

Network scanning is a discipline of network security that identifies active hosts on networks and determining whether there are any vulnerabilities that could be exploited. Nessus and Nmap are among the top tools that enable you to scan your network for vulnerabilities and open ports, which can be used as back doors into a network. Network Scanning Cookbook contains recipes for configuring these tools in your infrastructure that get you started with scanning ports, services, and devices in your network. As you progress through the chapters, you will learn how to carry out various key scanning tasks, such as firewall detection, OS detection, and access management, and will look at problems related to vulnerability scanning and exploitation in the network. The book also contains recipes for assessing remote services and the security risks that they bring to a network infrastructure. By the end of the book, you will be familiar with industry-grade tools for network scanning, and techniques for vulnerability scanning and network protection.

Preface

Who this book is for

What this book covers

To get the most out of this book

Sections

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Free Chapter

Introduction to Network Vulnerability Scanning

Basic networks and their components

Network Vulnerability Scanning

Uses

Complexity

Response

Summary

Understanding Network Scanning Tools

Introducing Nessus and Nmap

Installing and activating Nessus

Downloading and installing Nmap

Updating Nessus

Updating Nmap

Removing Nessus

Removing Nmap

Port Scanning

Introduction

How to specify a target

How to perform host discovery

How to identify open ports

How to manage specification and scan order

How to perform a script and version scan

How to detect operating system

How to detect and bypass network protection systems

How to use Zenmap

Vulnerability Scanning

Introduction

How to manage Nessus policies

How to manage Nessus settings

How to manage Nessus user accounts

How to choose a Nessus scan template and policy

How to perform a vulnerability scan using Nessus

How to manage Nessus scans

Configuration Audits

Introducing compliance scans

Selecting a compliance scan policy

Introducing configuration audits

Performing an operating system audit

Performing a database audit

Performing a web application scan

Report Analysis and Confirmation

Introduction

Understanding Nmap outputs

Understanding Nessus outputs

How to confirm Nessus vulnerabilities using Nmap and other tools

Understanding the Customization and Optimization of Nessus and Nmap

Introduction

Understanding Nmap Script Engine and its customization

Understanding the Nessus Audit policy and its customization

Network Scanning for IoT, SCADA/ICS

Introduction to SCADA/ICS

Using Nmap to scan SCADA/ICS

Using Nessus to scan SCADA/ICS systems

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Understanding Nmap Script Engine and its customization

The Nmap Script Engine is used to run custom scripts written by users to automate network-level actions. Typically, Nmap scripts end with a .nse extension. These scripts are used to perform the following tasks:

Host and port discovery: The whole purpose of Nmap being so widely used is to perform simple tasks to check whether the remote host is live or non-live, along with the current status of the ports.
Version detection: Nmap has a database of a variety of application and service signatures which are checked against the responses received from the ports to identify the service running on the port and sometimes the specific version as well.
Affected vulnerabilities: Nmap Script Engine allows users to determine whether a particular port/service is vulnerable to a specific disclosed vulnerability. It depends on the script...