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)

How to use Zenmap

Zenmap is the graphical interface of Nmap. It is open source and comes in the same installation package as Nmap:

Sometimes, working with command-line tools can be tedious for administrators, thus Zenmap acts as an alternate GUI option.

How do it...

Here are the steps:

  1. Open Zenmap from the list of programs.
  2. Enter the target to be scanned in the text field provided, as shown here:
  1. Select Quick scan from the Profile drop-down list, as shown here:
  1. This will perform a fast scan with the –F option, thereby giving results for the top 100 ports along with a detailed analysis in different tabs, as shown in the following screenshot:

The Ports/Hosts tab shows the various open ports along with the services...