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Configuration and Management
Which authentication and encryption method that should be used depends
on what is supported by the connected wireless client(s).
Note: Each wireless device must be configured to use exactly the same
security mode and key/passphrase as the Ericsson W21 or they
will not be able to connect.
In the “Authentication method” list you select which type of authentication/
encryption you want to use for your WLAN. The following subsections
describe the authentication methods supported by the Ericsson W21.
2.6.8.1 None
If you select “None” as authentication method no client configuration is
needed but be aware of that the WLAN will now be open without any kind
of security. For example, it is now possible for anyone with a computer and
a wireless interface card to connect to the Ericsson W21 at any time and
having access to both your home network and Internet connection.
2.6.8.2 WEP and WEP Encryption Key
WEP (Wired Equivalent Privacy) is considered to be a low security option.
The data is encrypted into blocks of either 64 bits length or 128 bits length.
WEP encrypted data can only be sent and received by users with access to
a private encryption key. This means that each device on your WLAN has
to be manually configured with the same key as the Ericsson W21 in order
to allow encrypted data transmissions.
• WEP (64 bit) data encryption requires a key including 10 characters.
Only hexadecimal numbers 0-9 and letters a-f (uppercase or
lowercase) are allowed.
• WEP (128 bit) data encryption requires a key including 26 characters.
Only hexadecimal numbers 0-9 and letters a-f (uppercase or
lowercase) are allowed.
Enter an encryption key in the “Passphrase / Key” field and click Apply to
save the settings.
2.6.8.3 WPA/WPA2 and Passphrase
WPA (Wi-Fi Protected Access) and its successor WPA2 are the most
reliable security options. WPA encryption uses the TKIP (Temporal Key
Integrity Protocol) while WPA2 encryption follows AES (Advanced
Encryption Standard). AES offers a higher level of security and is approved
40 1/1551-CRH 102 167 Uen Rev F 2008-07-09