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Cisco Network Security Fundamentals: Wireless Security

Chapter Description

This chapter covers wireless security—what it is, how it works, how it is configured, what threatens it, and what policies can be designed to secure it.

Case Study: Adding Wireless Solutions to a Secure Network

This case study covers the placement and configuration of a wireless access point in a real scenario. The setup and configuration of the wireless stations are covered, and there are screenshots of both the access point and the station. Figure 14-11 illustrates the Company XYZ network diagram for this scenario.

Figure 11Figure 14-11 Company XYZ Top-Level Network Layout

The CIO of Company XYZ has decided to integrate wireless technology throughout the company. The IT department has started the testing and planning phase and wants to roll out a pilot in a branch office of the company. Figure 14-12 zooms in on Figure 14-11 so only the relevant devices for this case study are shown.

Figure 12Figure 14-12 Company XYZ—Branch Office Setup

A local IT engineer starts to configure the access point according to the WLAN design specs defined in the company's security policy.

Figure 14-13 features a sample screenshot of the basic configuration of the access point.

Figure 13Figure 14-13 Branch Office Access Point—Basic Setup

Table 14-2 displays the main parameters of the express setup page used during the initial setup of the access point.

Table 14-2 Basic Access Point Options

Syntax

Description

System Name

Identifies the access point on your network

Configuration Server Protocol

Used to match the method of IP address assignment

Default IP Address

Assigns the access point's IP address

Default IP Subnet Mask

Assigns the access point's IP subnet mask

Default IP Gateway

Assigns the access point's IP gateway

Radio Service Set ID (SSID)

Is a unique identifier that client devices use to associate with the access point

SNMP Admin. Community

Enables SNMP through the entry of a string


Now that the access point is set up, the client (Host 1-192.168.0.2) can be configured using the wireless client software. During the setup, a corresponding SSID of the access point was entered. Figure 14-14 illustrates the main page of the client software utility.

Figure 14Figure 14-14 Wireless Client Utility

Figure 14-15 shows the link status meter.

Figure 15Figure 14-15 Wireless Link Status

At the bottom of the screen shown in Figure 14-15, notice that the signal strength and signal quality are excellent. Furthermore, Host 1 is associated with access point 192.168.0.4, which is the branch office access point. Figure 14-16 gives the overall status of the wireless connection.

Figure 16Figure 14-16 Wireless Status

The wireless case study covered the placement and configuration of a wireless access point and one sample client setup for Company XYZ. The case study illustrated that the implementation of wireless equipment in a network is fairly easy.

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