Allied Telesis Summit 24 User's Guide Page 86

  • Download
  • Add to my manuals
  • Print
  • Page
    / 198
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 85
86 Summit 300-48 Switch Software User Guide
Unified Access Security
incorporate each of these suites, and the Altitude 300 wireless port supports hardware-based AES and
RC4 encryption.
WPA-Only Support
To support WPA clients, the Summit 300-48 switch port sets the privacy bit in the beacon frames it
advertises. The switch also advertises the set of supported unicast and multicast cipher suites and the
configured and supported authentication modes as part of the association request. If the switch
advertises the cipher suites and authentication modes, then the client is able to associate with the
wireless port and is subject to further authentication and key derivation. If the cipher suites and
authentication modes are not advertised, then the client cannot associate with the wireless port.
WPA support is compatible with 802.1x authentication or pre-shared keys. With pre-shared keys, key
derivation and distribution are done using the EAPOL-KEY messages. All clients that indicate PSK are
assigned to the PSK VLAN, which is configured on the Summit 300-48 switch port. The switch
advertises this information using WPA IEs.
Legacy and WPA 802.1x Support
It is possible to support WEP40 and WEP104 as unicast cipher suites along with legacy and WPA-based
clients. You can configure the WEP options independently of the AES and TKIP options used for WPA.
The multicast uses the lowest WEP suite. The switch advertises the set of unicast cipher and multicast
suites using WPA IEs.
1
If dot1x authentication is set to all and the same VLAN is used for WPA and legacy clients, then
session key derivation and distribution takes place independently. For multicast keys, the legacy 802.1x
is now used for all clients. When legacy and WPA clients are supported simultaneously, group key
updates are disabled.
When Legacy 802.1x and WPA clients are both allowed access, then a different set of keys are used for
legacy clients and for WPA clients. WPA clients can use AES and TKIP encryption, while legacy clients
use WEP encryption. The multicast cipher can be set to AES, TKIP, or WEP, in which case the unicast
cipher used by WPA clients will be AES, TKIP, and WEP respectively.
NOTE
Legacy and WPA clients should not be put on the same VLAN.
Table 28: Wi-Fi Security Cipher Suites
Name Authentication Privacy
Sponsoring
Organization
WEP None or MAC WEP/RC4 IEEE
WPA 802.1x TKIP/RC4 Wi-Fi Alliance
WPA 802.1x CCMP/AES/TKIP IEEE
1. 40-bit WEP encryption is sometimes called 64bit (40+24IV), and 104-bit encryption is sometimes
called 128bit (104+24IV).
Page view 85
1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 197 198

Comments to this Manuals

No comments