Book Image

Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition

By : Paulino Calderon
Book Image

Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition

By: Paulino Calderon

Overview of this book

Nmap is one of the most powerful tools for network discovery and security auditing used by millions of IT professionals, from system administrators to cybersecurity specialists. This third edition of the Nmap: Network Exploration and Security Auditing Cookbook introduces Nmap and its family - Ncat, Ncrack, Ndiff, Zenmap, and the Nmap Scripting Engine (NSE) - and guides you through numerous tasks that are relevant to security engineers in today’s technology ecosystems. The book discusses some of the most common and useful tasks for scanning hosts, networks, applications, mainframes, Unix and Windows environments, and ICS/SCADA systems. Advanced Nmap users can benefit from this book by exploring the hidden functionalities within Nmap and its scripts as well as advanced workflows and configurations to fine-tune their scans. Seasoned users will find new applications and third-party tools that can help them manage scans and even start developing their own NSE scripts. Practical examples featured in a cookbook format make this book perfect for quickly remembering Nmap options, scripts and arguments, and more. By the end of this Nmap book, you will be able to successfully scan numerous hosts, exploit vulnerable areas, and gather valuable information.
Table of Contents (22 chapters)
Appendix A: HTTP, HTTP Pipelining, and Web Crawling Configuration Options
Appendix Β: Brute-Force Password Auditing Options
Appendix F: References and Additional Reading

Enumerating Modbus devices

Modbus TCP/IP is a communication protocol used for transmitting information by many SCADA devices. It is considered one of the most popular open protocols and it is possible to find valid slave IDs and obtain information about the device and software remotely.

This recipe shows you how to enumerate Modbus Slave IDs (SIDs) with Nmap.

How to do it...

Open your terminal and enter the following Nmap command:

$ nmap -Pn -sT -p502 --script modbus-discover <target>

By default, the modbus-discover script will obtain the first SID device information, as shown next. The information displayed depends on the device's response:

PORT STATE SERVICE
502/tcp open    modbus
| modbus-discover:
|    sid0x0:
|_   Slave ID data: \xB4\xFFLMB3.0.3

How it works...

The modbus-discover script enumerates Modbus devices and their SID information. It was written by Alexander Rudakov to improve the...