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

Brute-forcing z/OS JES NJE node names

NJE node communication requires exchanging the client name and the target node name. While the client name can be set arbitrarily, the OHOST value or node name is often unknown. With Nmap, you can attempt to guess a valid node name by performing a brute-force attack.

This recipe introduces the nje-node-brute script, which allows the brute-force enumeration of z/OS JES NJE.

How to do it...

Open up Terminal and enter the following Nmap command to brute-force the target node name:

$ nmap -sV --script nje-node-brute <target>

The script will return any valid node names found following the output format of the brute NSE library:

PORT    STATE SERVICE REASON
175/tcp open  nje     syn-ack
| nje-node-brute:
|   Node Name:
|     POTATO:CACTUS - Valid credentials
|_  Statistics: Performed 6 guesses in 14 seconds, average tps: 0...