Book Image

Securing Network Infrastructure

By : Sairam Jetty, Sagar Rahalkar
Book Image

Securing Network Infrastructure

By: Sairam Jetty, Sagar Rahalkar

Overview of this book

Digitization drives technology today, which is why it’s so important for organizations to design security mechanisms for their network infrastructures. Analyzing vulnerabilities is one of the best ways to secure your network infrastructure. This Learning Path begins by introducing you to the various concepts of network security assessment, workflows, and architectures. You will learn to employ open source tools to perform both active and passive network scanning and use these results to analyze and design a threat model for network security. With a firm understanding of the basics, you will then explore how to use Nessus and Nmap to scan your network for vulnerabilities and open ports and gain back door entry into a network. As you progress through the chapters, you will gain insights into how to carry out various key scanning tasks, including firewall detection, OS detection, and access management to detect vulnerabilities in your network. By the end of this Learning Path, you will be familiar with the tools you need for network scanning and techniques for vulnerability scanning and network protection. This Learning Path includes content from the following Packt books: •Network Scanning Cookbook by Sairam Jetty •Network Vulnerability Assessment by Sagar Rahalkar

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Securing Network Infrastructure
Sairam Jetty | Sagar Rahalkar
Mar, 2019 | 8 hours 58 minutes
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Table of Contents (28 chapters)
Title Page
Title Page
Copyright and Credits
Copyright and Credits
About Packt
About Packt
Contributors
Contributors
Preface
Preface
Free Chapter
1
Introduction to Network Vulnerability Scanning
Introduction to Network Vulnerability Scanning
Basic networks and their components
Network Vulnerability Scanning
Uses
Complexity
Response
Summary
2
Understanding Network Scanning Tools
Understanding Network Scanning Tools
Introducing Nessus and Nmap
Installing and activating Nessus
Downloading and installing Nmap
Updating Nessus
Updating Nmap
Removing Nessus
Removing Nmap
3
Port Scanning
Port Scanning
Introduction
How to specify a target
How to perform host discovery
How to identify open ports
How to manage specification and scan order
How to perform a script and version scan
How to detect operating system
How to detect and bypass network protection systems
How to use Zenmap
4
Vulnerability Scanning
Vulnerability Scanning
Introduction
How to manage Nessus policies
How to manage Nessus settings
How to manage Nessus user accounts
How to choose a Nessus scan template and policy
How to perform a vulnerability scan using Nessus
How to manage Nessus scans
5
Configuration Audits
Configuration Audits
Introducing compliance scans
Selecting a compliance scan policy
Introducing configuration audits
Performing an operating system audit
Performing a database audit
Performing a web application scan
6
Report Analysis and Confirmation
Report Analysis and Confirmation
Introduction
Understanding Nmap outputs
Understanding Nessus outputs
How to confirm Nessus vulnerabilities using Nmap and other tools
7
Understanding the Customization and Optimization of Nessus and Nmap
Understanding the Customization and Optimization of Nessus and Nmap
Introduction
Understanding Nmap Script Engine and its customization
Understanding the Nessus Audit policy and its customization
8
Network Scanning for IoT, SCADA/ICS
Network Scanning for IoT, SCADA/ICS
Introduction to SCADA/ICS
Using Nmap to scan SCADA/ICS
Using Nessus to scan SCADA/ICS systems
9
Vulnerability Management Governance
Vulnerability Management Governance
Security basics
Understanding the need for security assessments
Business drivers for vulnerability management
Calculating ROIs
Setting up the context
Policy versus procedure versus standard versus guideline
Penetration testing standards
Industry standards
Summary
Exercises
10
Setting Up the Assessment Environment
Setting Up the Assessment Environment
Setting up a Kali virtual machine
Basics of Kali Linux
Environment configuration and setup
List of tools to be used during assessment
Summary
11
Security Assessment Prerequisites
Security Assessment Prerequisites
Target scoping and planning
Gathering requirements
Deciding upon the type of vulnerability assessment
Estimating the resources and deliverables
Preparing a test plan
Getting approval and signing NDAs
Summary
12
Information Gathering
Information Gathering
What is information gathering?
Passive information gathering
Active information gathering
Summary
13
Enumeration and Vulnerability Assessment
Enumeration and Vulnerability Assessment
What is enumeration?
Enumerating services
Using Nmap scripts
Vulnerability assessments using OpenVAS
Summary
14
Gaining Network Access
Gaining Network Access
Gaining remote access
Cracking passwords
Creating backdoors using Backdoor Factory
Exploiting remote services using Metasploit
Hacking embedded devices using RouterSploit
Social engineering using SET
Summary
15
Assessing Web Application Security
Assessing Web Application Security
Importance of web application security testing
Application profiling
Common web application security testing tools
Authentication
Authorization
Session management
Input validation
Security misconfiguration
Business logic flaws
Auditing and logging
Cryptography
Testing tools
Summary
16
Privilege Escalation
Privilege Escalation
What is privilege escalation?
Horizontal versus vertical privilege escalation
Privilege escalation on Windows
Privilege escalation on Linux
Summary
17
Maintaining Access and Clearing Tracks
Maintaining Access and Clearing Tracks
Maintaining access
Clearing tracks and trails
Anti-forensics
Summary
18
Vulnerability Scoring
Vulnerability Scoring
Requirements for vulnerability scoring
Vulnerability scoring using CVSS
CVSS calculator
Summary
19
Threat Modeling
Threat Modeling
What is threat modeling?
Benefits of threat modeling
Threat modeling terminology
How to model threats?
Threat modeling techniques
Threat modeling tools
Summary
20
Patching and Security Hardening
Patching and Security Hardening
Defining patching?
Patch enumeration
Security hardening and secure configuration reviews
Summary
21
Vulnerability Reporting and Metrics
Vulnerability Reporting and Metrics
Importance of reporting
Type of reports
Reporting tools
Collaborative vulnerability management with Faraday v2.6
Metrics
Summary
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Index
Index

Removing Nmap

The uninstallation process of Nmap is pretty straightforward on both Windows and Linux. This will remove all the dependencies and libraries that have been installed by Nmap. 

How to do it…

Follow these steps to uninstall Nmap on Windows:

  1. Navigate to the Control Panel of the Windows machine
  2. Select Uninstall or change a program
  3. Locate and select the Nmap package in the list of software installed
  4. Click Uninstall

This will uninstall the Nmap software and its data from any Windows machine.

There's more…

 In Linux-based distributions, you can simply delete all the folders pertaining to Nmap to uninstall Nmap from your machine. If you have installed Nmap from a downloaded source, there will exist an uninstallation script in the same folder that will uninstall Nmap from your machine. Furthermore, if it was installed in the default location, it can be removed using the following commands:

rm -f bin/Nmap bin/nmapfe bin/xnmap
rm -f man/man1/Nmap.1 man/man1/zenmap.1
rm -rf share/Nmap
./bin/uninstall_zenmap...
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