Cisco 1231G - Aironet - Wireless Access Point Especificaciones descargar pdf (Pagina 119)

4-7

Cisco Aironet 1200 Series Access Point Software Configuration Guide

OL-2159-01

Chapter 4 Security Setup

Security Overview

Figure 4-3 Sequence for MAC-Based Authentication

•

Open—Allows any device to authenticate and then attempt to communicate

with the access point. Using open authentication, any wireless device can

authenticate with the access point, but the device can only communicate if its

WEP keys match the access point’s. Devices not using WEP do not attempt

to authenticate with an access point that is using WEP. Open authentication

does not rely on a RADIUS server on your network.

Figure 4-4 shows the authentication sequence between a device trying to

authenticate and an access point using open authentication. In this example,

the device’s WEP key does not match the access point’s key, so it can

authenticate but not pass data.

Figure 4-4 Sequence for Open Authentication

• Shared key—Cisco provides shared key authentication to comply with the

IEEE 802.11b standard. However, because of shared key’s security flaws, we

recommend that you avoid using it.

Access point

or bridge

Wired LAN

Client

device

Server

1. Authentication request

2. Identity request

3. MAC address

(relay to client)

(relay to server)

4. Successful authentication

65584

Access point

or bridge

with WEP key = 123

Client device

with WEP key = 321

1. Authentication request

2. Authentication response

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Cisco 1231G - Aironet - Wireless Access Point Especificaciones Pagina 119