Packt+ | Advance your knowledge in tech

0

Explore Products

Best Sellers

New Releases

Books

Videos

Audiobooks

Free Learning

Nmap: Network Exploration and Security Auditing Cookbook

You're reading from Nmap: Network Exploration and Security Auditing Cookbook Network discovery and security scanning at your fingertips

Product type Paperback

Published in May 2017

Publisher

ISBN-13 9781786467454

Length 416 pages

Edition 2nd Edition

Languages

Lua

Tools

Nmap

Concepts

Penetration Testing

Author (1):

Paulino Calderon

View More author details

Table of Contents (18) Chapters

Preface

1. Nmap Fundamentals

2. Network Exploration FREE CHAPTER

3. Reconnaissance Tasks

4. Scanning Web Servers

5. Scanning Databases

6. Scanning Mail Servers

7. Scanning Windows Systems

8. Scanning ICS SCADA Systems

9. Optimizing Scans

10. Generating Scan Reports

11. Writing Your Own NSE Scripts

12. HTTP, HTTP Pipelining, and Web Crawling Configuration Options

13. Brute Force Password Auditing Options

Brute modes

14. NSE Debugging

15. Additional Output Options

16. Introduction to Lua

17. References and Additional Reading

Detecting SMTP open relays

Open relays are insecure mail servers that allow third-party domains to use them without authorization. They are abused by spammers and phishers, and they present a serious risk to organizations because public spam blacklists may add the relay servers and affect the entire organization depending on e-mails reaching its destination.

This recipe shows how to detect SMTP open relays with Nmap.

How to do it...

Open your terminal and enter the following Nmap command:

$ nmap -sV --script smtp-open-relay -v <target>

The output returns the number of tests that passed, if the SMTP server is an open relay, and the command combination used:

   Host script results:
   | smtp-open-relay: Server is an open relay (1/16 tests)
   |_MAIL FROM:<antispam@insecure.org> -> RCPT TO:    
   <relaytest@insecure.org>

How it works...

The smtp-open-relay script was submitted by Arturo Buanzo Busleiman, and it attempts 16 different tests to determine if an SMTP server allows...

The rest of the chapter is locked

Register for a free Packt account to unlock a world of extra content!

A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.

Unlock this book and the full library FREE for 7 days

Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of

Start free trial

Renews at $19.99/month. Cancel anytime

Authors (1)

Paulino Calderon

Paulino Calderon

Paulino Calderon (@calderpwn on Twitter) is the cofounder of Websec, a company offering information security consulting services based in Mexico and Canada. When he is not traveling to a security conference or conducting on-site consulting for Fortune 500 companies, he spends peaceful days in Cozumel, a beautiful small island in the Caribbean, learning new technologies, conducting big data experiments, developing new tools, and finding bugs in software. Paulino is active in the open source community, and his contributions are used by millions of people in the information security industry. In 2011, Paulino joined the Nmap team during the Google Summer of Code to work on the project as an NSE developer. He focused on improving the web scanning capabilities of Nmap, and he has kept contributing to the project since then. In addition, he has been a mentor for students who focused on vulnerability detection during the Google Summer of Code 2015 and 2017. He has published Nmap 6: Network Exploration and Security Auditing Cookbook and Mastering the Nmap Scripting Engine, which cover practical tasks with Nmap and NSE development in depth. He loves attending information security conferences, and he has given talks and participated in workshops in dozens of events in Canada, the United States, Mexico, Colombia, Peru, Bolivia, and Curacao.

See other products by Paulino Calderon

Other recommended products

Related to this chapter

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Nmap Network Exploration and Security Auditing Cookbook

Nmap Network Exploration and Security Auditing Cookbook

This book explores how Nmap is one of the most robust tools for network discovery and security auditing. You'll focus on how you can use it to perform hundreds of different tasks, from OS detection and port scanning to advanced fingerprinting and vulnerability exploitation.

Sep 2021 14h 32m

Network Scanning Cookbook

Network Scanning Cookbook

Network Scanning Cookbook enables a reader to understand how to perform a Network Scan, which includes Discovery, Scanning, Enumeration, Vulnerability detection etc using scanning tools like Nessus and Nmap. If the reader is an auditor, they will be able to determine the security state of the client's network and recommend remediations accordingly.

Sep 2018 10h 8m

Metasploit Penetration Testing Cookbook

Metasploit Penetration Testing Cookbook

Metasploit is the world's leading penetration testing tool and helps security and IT professionals find, exploit, and validate vulnerabilities. Metasploit allows penetration testing automation, password auditing, web application scanning, social engineering, post exploitation, evidence collection, and reporting. Metasploit's integration with InsightVM (or Nexpose), Nessus, OpenVas, and other vulnerability scanners provides a validation solution that simplifies vulnerability prioritization and remediation reporting. Teams can collaborate in Metasploit and present their findings in consolidated reports.

Feb 2018 14h 12m

Metasploit Penetration Testing Cookbook

Metasploit Penetration Testing Cookbook

Metasploit is the world's leading penetration testing tool and helps security and IT professionals find, exploit, and validate vulnerabilities. Metasploit allows penetration testing automation, password auditing, web application scanning, social engineering, post exploitation, evidence collection, and reporting. Metasploit's integration with InsightVM (or Nexpose), Nessus, OpenVas, and other vulnerability scanners provides a validation solution that simplifies vulnerability prioritization and remediation reporting. Teams can collaborate in Metasploit and present their findings in consolidated reports.

Feb 2018 14h 12m

Metasploit Penetration Testing Cookbook

Metasploit Penetration Testing Cookbook

Metasploit is the world's leading penetration testing tool and helps security and IT professionals find, exploit, and validate vulnerabilities. Metasploit allows penetration testing automation, password auditing, web application scanning, social engineering, post exploitation, evidence collection, and reporting. Metasploit's integration with InsightVM (or Nexpose), Nessus, OpenVas, and other vulnerability scanners provides a validation solution that simplifies vulnerability prioritization and remediation reporting. Teams can collaborate in Metasploit and present their findings in consolidated reports.

Feb 2018 14h 12m

Metasploit Penetration Testing Cookbook

Metasploit Penetration Testing Cookbook

Metasploit is the world's leading penetration testing tool and helps security and IT professionals find, exploit, and validate vulnerabilities. Metasploit allows penetration testing automation, password auditing, web application scanning, social engineering, post exploitation, evidence collection, and reporting. Metasploit's integration with InsightVM (or Nexpose), Nessus, OpenVas, and other vulnerability scanners provides a validation solution that simplifies vulnerability prioritization and remediation reporting. Teams can collaborate in Metasploit and present their findings in consolidated reports.

Feb 2018 14h 12m

Personalised recommendations for you

Based on your interests and search pattern

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

The Aspiring CIO and CISO

The Aspiring CIO and CISO

This book helps entry, mid-level, and senior managers master soft skills, craft a compelling brand, and strategically plan their career in C-suite roles with the help of expert insights needed for success in digital leadership and executive roles.

Jun 2024 8h 32m

Malware Development for Ethical Hackers

Malware Development for Ethical Hackers

This book will help you understand malware development by delving into the intricate mechanisms of malware development, injection attacks, and advanced evasion strategies with over 80 real-life examples.

Jun 2024 13h 0m

Malware Development for Ethical Hackers

Malware Development for Ethical Hackers

This book will help you understand malware development by delving into the intricate mechanisms of malware development, injection attacks, and advanced evasion strategies with over 80 real-life examples.

Jun 2024 13h 0m

Malware Development for Ethical Hackers

Malware Development for Ethical Hackers

This book will help you understand malware development by delving into the intricate mechanisms of malware development, injection attacks, and advanced evasion strategies with over 80 real-life examples.

Jun 2024 13h 0m

Malware Development for Ethical Hackers

Malware Development for Ethical Hackers

This book will help you understand malware development by delving into the intricate mechanisms of malware development, injection attacks, and advanced evasion strategies with over 80 real-life examples.

Jun 2024 13h 0m

Malware Development for Ethical Hackers

Malware Development for Ethical Hackers

This book will help you understand malware development by delving into the intricate mechanisms of malware development, injection attacks, and advanced evasion strategies with over 80 real-life examples.

Jun 2024 13h 0m