Scanning Networks - p.9

Lab 8

Drawing Network Diagrams Using LANSurveyor

Lan sunvejor discovers a nehvork andproduces a comprehensive nehvork diagram that integrates OSI Layer 2 and Lajer 3 topology data.

Lab Scenario

Ail attacker can gather information fiom ARP Scan, DHCP Servers, etc. using NetScan Tools Pro, as you have learned in die previous lab. Using diis information an attacker can compromise a DHCP server 011 the network; they might disrupt network services, preventing DHCP clients from connecting to network resources. By gaining control of a DHCP server, attackers can configure DHCP clients with fraudulent TCP/IP configuration information, including an invalid default gateway or DNS server configuration.

in diis lab, you will learn to draw network diagrams using LANSurveyor. To be an expert network administrator and penetration tester you need to discover network topology and produce comprehensive network diagrams for discovered networks.

Lab Objectives

The objective of diis lab is to help students discover and diagram network topology and map a discovered network.

in diis lab, you need to:

■ Draw’ a map showing die logical connectivity of your network and navigate around die map
■ Create a report diat includes all you! managed switches and hubs

Lab Environment

To perform die lab, you need:

■ LANSurveyor located at D:\CEH-Tools\CEHv8 Module 03 Scanning Networks\Network Discovery and Mapping Tools\LANsurveyor
■ You can also download the latest version of LANSurveyor from die link http: / / www.solarwi11ds.com/
■ If you decide to download die latest version, dien screenshots shown in die lab might differ
■ A computer miming Windows Server 2012
■ A web browser widi Internet access
■ Administrative privileges to mil die LANSurveyor tool
Lab Duration

Time: 10 Minutes

Overview o f LANSurveyor

SolarWinds LANsurveyor automatically discovers your network and produces a comprehensive network diagram that can be easily exported to Microsoft Office Visio. LANsurveyor automatically detects new devices and changes to network topology. It simplifies inventory management for hardware and software assets, addresses reporting needs for PCI compliance and other regulatory requirements.

Lab Tasks

Install LANSurveyor on your Windows Server 2012 Follow die wizard-driven installation steps and install LANSurvyor.

1. Launch the Start menu by hovering die mouse cursor in the lower-left
corner of the desktop

FIGURE 8.1: Windows Server 2012 - Desktop view

2. Click the LANSurvyor app to open the LANSurvyor window

FIGURE 8.2 Windows Server 2012 - Apps

3. Review the limitations o f the evaluation software and then click Continue with Evaluation to continue the evaluation

FIGURE 8.3: LANSurveyor evaluation window

4. The Getting Started with LANsurveyor dialog box is displayed. Click Start Scanning Network

FIGURE 8.4: Getting Started with LANSurveyor Wizard

5. The Create A Network Map window will appears; in order to draw a network diagram enter the IP address in Begin Address and End Address, and click Start Network Discovery

FIGURE 8.5: New Network Map window

6. The entered IP address mapping process will display as shown in the following figure

FIGURE 8.6: Mapping progress window

7. LANsurveyor displays die map of your network

FIGURE 8.7: Resulted network diagram

Lab Analysis

Document all die IP addresses, domain names, node names, IP routers, and SNMP nodes you discovered during die lab.

Questions
1. Does LANSurveyor map every IP address to its corresponding switch or hub port?

2. Can examine nodes connected via wireless access points be detected and mapped?