Proxicast LAN-Cell 2 User's Guide download pdf (Page 147)

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Chapter 7 Wireless LAN (WLAN) Screens

LAN-Cell 2 User’s Guide

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7.6 Wireless Security Overview

The following sections introduce different types of wireless security you can set up in the

wireless network.

7.6.1 SSID

Normally, the AP acts like a beacon and regularly broadcasts the SSID in the area. You can

hide the SSID instead, in which case the AP does not broadcast the SSID. In addition, you

should change the default SSID to something that is difficult to guess.

This type of security is fairly weak, however, because there are ways for unauthorized devices

to get the SSID. In addition, unauthorized devices can still see the information that is sent in

the wireless network.

7.6.2 MAC Address Filter

Every wireless client has a unique identification number, called a MAC address.

A MAC

address is usually written using twelve hexadecimal characters

; for example, 001B39000002

or 00:1B:39:00:00:02. To get the MAC address for each wireless client, see the appropriate

User’s Guide or other documentation.

You can use the MAC address filter to tell the AP which wireless clients are allowed or not

allowed to use the wireless network. If a wireless client is allowed to use the wireless network,

it still has to have the correct settings (SSID, channel, and security). If a wireless client is not

allowed to use the wireless network, it does not matter if it has the correct settings.

This type of security does not protect the information that is sent in the wireless network.

Furthermore, there are ways for unauthorized devices to get the MAC address of an authorized

wireless client. Then, they can use that MAC address to use the wireless network.

7.6.3 User Authentication

You can make every user log in to the wireless network before they can use it. This is called

user authentication. However, every wireless client in the wireless network has to support

IEEE 802.1x to do this.

For wireless networks, there are two typical places to store the user names and passwords for

each user.

• In the AP: this feature is called a local user database or a local database.

• In a RADIUS server: this is a server used in businesses more than in homes.

2. Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless

networks. These kinds of wireless devices might not have MAC addresses.

3. Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.

1 2 ... 142 143 144 145 146 147 148 149 150 151 152 ... 649 650

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