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Table Of Contents

NMAP Essentials

By : Shaw

4 (1)

NMAP Essentials

4 (1)

By: Shaw

Overview of this book

This book is for beginners who wish to start using Nmap, who have experience as a system administrator or of network engineering, and who wish to get started with Nmap.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Introduction to Nmap

1. Introduction to Nmap

Nmap's humble beginnings

The many uses of Nmap

Installing Nmap

Building Nmap from source

Summary

2. Network Fundamentals

2. Network Fundamentals

The structure of the Internet

The OSI model

Port scanning

TCP and UDP

Service banners

Summary

3. Nmap Basics

3. Nmap Basics

How to choose a target

Running a default scan

Service version scans

Logging scans

Specified scan ranges

Understanding the reason flag

Summary

4. Advanced Nmap Scans

4. Advanced Nmap Scans

Host detection methods

Running a ping agnostic scan

Scanning UDP services

Special TCP scans

Operating system detection

Increasing verbosity in scans

Packet tracing

Summary

5. Performance Optimization

5. Performance Optimization

Nmap timing optimization

Customized host group sizes

Increasing and decreasing parallelism

Dealing with stuck hosts

Delaying and increasing probe rates

Summary

6. Introduction to the Nmap Scripting Engine

6. Introduction to the Nmap Scripting Engine

The history of the NSE

The inner working of the NSE

Finding Nmap scripts

Running Nmap scripts

Summary

7. Writing Nmap Scripts

7. Writing Nmap Scripts

Anatomy of an Nmap script

Defining an Nmap script – script headers

Triggering functions – the rule

Defining a script's action

Summary

8. Additional Nmap Tools

8. Additional Nmap Tools

Attacking services with Ncrack

Host detection with Nping

File transfers and backdoors with Ncat

Comparing Nmap results with Ndiff

Summary

9. Vulnerability Assessments and Tools

9. Vulnerability Assessments and Tools

Conducting vulnerability scans with Nessus

Assessing web server issues with Nikto

Identifying sensitive web directories with DirBuster

Getting started with intercepting proxies

Summary

10. Penetration Testing with Metasploit

10. Penetration Testing with Metasploit

Installing Metasploit

Scanning with Metasploit

Attacking services with Metasploit

What to learn next

Summary

Index

Index

Chapter 2. Network Fundamentals

Before it's possible for us to use Nmap as a tool, we first need to understand the very basics of how it works. In order to scan networks (including the Internet), we must initially understand the concepts on which all networks are built. Although this book will not describe in-depth networking concepts—you won't become a packet ninja by learning to use Nmap—we do need to ensure that we can interpret the scan results from standard and advanced Nmap scans. Without the fundamentals of networking, we will not be able to scan at all!

The following topics will be covered in this chapter:

How networks work
The difference between TCP and UDP
An introduction to ports
How port scanning works
How service version detection and banner grabbing work

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Tech Concepts

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Programming languages

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