Introduction Nessus is a popular vulnerability scanner used to identify potential security risks in networks, systems, and applications. Docker is a containerization platform that allows users to package, ship, and run applications in containers. In this text, we will explore how to use Nessus with Docker, focusing on working with containers and vulnerability scanning. Prerequisites

Docker installed on your system A basic understanding of Docker and containerization A Nessus scanner (either a Nessus Essentials or Nessus Professional subscription)

Setting up Nessus with Docker To run Nessus in a Docker container, you'll need to pull the official Nessus image from Docker Hub: docker pull tenable/nessus

Once the image is downloaded, you can create a new container from it: docker run -d --name nessus -p 8834:8834 tenable/nessus

This command creates a new container named "nessus" and maps port 8834 on the host machine to port 8834 in the container. Initial Setup and Activation After starting the container, you'll need to perform the initial setup and activation:

Open a web browser and navigate to https://localhost:8834 (or the IP address of your Docker host). Follow the prompts to create an administrator account and agree to the terms of service. You'll be asked to activate your Nessus scanner. If you have a Nessus Essentials subscription, you can activate it using your activation code. If you're using Nessus Professional, you'll need to use your credentials.

Configuring Nessus for Docker To configure Nessus to scan Docker containers, you'll need to:

Create a new scan policy: Go to Settings > Scan Policies and create a new policy. Select the Docker scan type. Configure the Docker settings: In the policy settings, you'll need to specify the Docker host and authentication details.

Scanning Docker Containers To scan a Docker container, follow these steps:

Create a new scan: Go to Scans > New Scan and select the scan policy you created earlier. Choose the Docker container as the target: Enter the name or ID of the container you want to scan.

Cracking (Vulnerability Scanning) Nessus uses various techniques to identify vulnerabilities in your Docker containers. The scanning process involves:

Enumerating services and open ports Identifying installed packages and software Checking for vulnerabilities using various scanning techniques (e.g., CVE lookups)

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