D-Link Wireless ADSL2/2+ 4-port Ethernet Router DSL-2640U - Manual (Page 17)

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Wireless – Security
The next screen is the Wireless – Security screen which allows you to select the
network authentication method and to enable or disable WEP encryption. Note
that depending on the network authentication that is selected, the screen will
change accordingly so additional fields can be configured for the specific
authentication method.
Network authentication methods include the following—
• Open— anyone can access the network. The default is a disabled WEP
encryption setting.
• Shared— WEP encryption is enabled and encryption key strength of 64-bit or
128-bit needs to be selected. Click on Set Encryption Keys to manually set
the network encryption keys. Up to 4 different keys can be set and you can
come back to select which one to use at anytime.
• 802.1X— requires mutual authentication between a client station and the
router by including a RADIUS-based authentication server. Information
about the RADIUS server such as its IP address, port and key must be
entered. WEP encryption is also enabled and the encryption strength must
also be selected.
• WPA—(Wi-Fi Protected Access)— usually used for the larger Enterprise
environment, it uses a RADIUS server and TKIP (Temporal Key Integrity
Protocol) encryption (instead of WEP encryption which is disabled). TKIP
uses128-bit dynamic session keys (per user, per session, and per packet
keys).
• WPA-PSK (Wi-Fi Protected Access – Pre-Shared Key)— WPA for home and
SOHO environments also using the same strong TKIP encryption, per-packet
key construction, and key management that WPA provides in the enterprise
environment. The main difference is that the password is entered manually.
A group re-key interval time is also required.
• WPA2 (Wi-Fi Protected Access 2)— second generation of WPA which uses
AES (Advanced Encryption Standard) instead of TKIP as its encryption
method. Network re-auth interval is the time in which another key needs
to be dynamically issued.
• WPA2-PSK (Wi-Fi Protected Access 2 – Pre-Shared Key)— suitable for home
and SOHO environments, it also uses AES encryption and requires you to
enter a password and an re-key interval time.
• Mixed WPA2 / WPA— during transitional times for upgrades in the
enterprise environment, this mixed authentication method allows
“upgraded” and users not yet “upgraded” to access the network via the
router. RADIUS server information must be entered for WPA and a as well
as a group re-key interval time. Both TKIP and AES are used.
• Mixed WPA2 / WPA-PSK— useful during transitional times for upgrades in
the home or SOHO environment, a pre-shared key must be entered along
with the group re-key interval time. Both TKIP and AES are also used.