Netgear DG834GT DG834GT Reference Manual - Page 156

Shared Key Authentication, 11b Authentication, Open System Steps

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router 2. The access point authenticates the station. 3. The station associates with the access point and joins the network. This process is illustrated below. 802.11b Authentication Open System Steps 1) Authentication request sent to AP 2) AP authenticates Client attempting to connect 3) Client connects to network Access Point Router Cable/DSL ProSafeWirelessVPN Security Firewall PWR TEST IN TER N ET LNK W LA N LO CA L MODEL FVM318 100 ACT Enable LNK/ACT 1 2 3 4 5 6 7 8 Figure D-1: Open system authentication Shared Key Authentication The following steps occur when two devices use Shared Key Authentication: 1. The station sends an authentication request to the access point. 2. The access point sends challenge text to the station. 3. The station uses its configured 64-bit or 128-bit default key to encrypt the challenge text, and sends the encrypted text to the access point. 4. The access point decrypts the encrypted text using its configured WEP Key that corresponds to the station's default key. The access point compares the decrypted text with the original challenge text. If the decrypted text matches the original challenge text, then the access point and the station share the same WEP Key and the access point authenticates the station. 5. The station connects to the network. If the decrypted text does not match the original challenge text (the access point and station do not share the same WEP Key), then the access point will refuse to authenticate the station and the station will be unable to communicate with either the 802.11 network or Ethernet network. This process is illustrated below. D-4 Wireless Networking Basics August 2004

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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router
D-4
Wireless Networking Basics
August 2004
2.
The access point authenticates the station.
3.
The station associates with the access point and joins the network.
This process is illustrated below.
Figure D-1:
Open system authentication
Shared Key Authentication
The following steps occur when two devices use Shared Key Authentication:
1.
The station sends an authentication request to the access point.
2.
The access point sends challenge text to the station.
3.
The station uses its configured 64-bit or 128-bit default key to encrypt the challenge text, and
sends the encrypted text to the access point.
4.
The access point decrypts the encrypted text using its configured WEP Key that corresponds
to the station’s default key. The access point compares the decrypted text with the original
challenge text. If the decrypted text matches the original challenge text, then the access point
and the station share the same WEP Key and the access point authenticates the station.
5.
The station connects to the network.
If the decrypted text does not match the original challenge text (the access point and station do not
share the same WEP Key), then the access point will refuse to authenticate the station and the
station will be unable to communicate with either the 802.11 network or Ethernet network.
This process is illustrated below.
FVM318
Access Point
1) Authentication request sent to AP
2) AP authenticates
3) Client connects to network
802.11b Authentication
Open System Steps
Client
attempting
to connect
Router