Book Image

Network Scanning Cookbook

By : Sairam Jetty
Book Image

Network Scanning Cookbook

By: Sairam Jetty

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.
Table of Contents (10 chapters)

Using Nmap to scan SCADA/ICS

Nmap provides multiple scripts, and its function also allows users to create multiple custom scripts to identify the SCADA systems that are present in a network. This allows an analyst to create specific test cases to test the SCADA systems. Some of the scripts that are available by default in the latest Nmap Script library are as follows:

  • s7-info.nse: This is used to enumerate Siemens S7 PLC devices and collect information such as system name, version, module, and type. This script works similarly to that of the PLCScan utility.
  • modbus-discover.nse: Enumerates SCADA Modbus slave ids (sids) and collects information such as sid number and slave ID data. Modbus is a protocol used by various PLC and SCADA systems.

We will see the syntax and the usage of these scripts in the following recipes.