Users Guide

Table 56: Captive Portal Authentication Using XML-API
When Authentication Servers Are Available
When Authentication Servers Are Not
Available
For authentication requests from an External Captive
Portal using the XML-API, PAP is used to authenticate
these requests with an external authentication server.
l If authentication succeeds, the associated access
credential with an encrypted SHA-1 hash of the
password and Key Reply attributes are stored in
the Survival Server database.
l If authentication fails, the associated access
credential and Key Reply attributes associated with
the PAP method (if they exist) are deleted from the
Survival Server database.
When no in-service server in the associated server
group is available, the Survival Server is used to
authenticate the Captive portal client using PAP.
The Survival Server uses the previously stored
unexpired access credential to perform authentication
and, upon successful authentication, returns the
previously stored Key Reply attributes.
Authentication for 802.1X Clients
This section describes the authentication procedures for 802.1X clients, both when the branch's authentication
servers are available and when they are not available. When the authentication servers are not available, the
Survival Server takes over the handling of authentication requests.
For 802.1X clients, the authentication scenarios include two different 802.1X termination modes:
l 802.1X termination disabled at the Wireless LAN Controller
l 802.1X termination enabled at the Wireless LAN Controller
802.1X Termination Disabled at the Wireless LAN Controller
Table 57: 802.1X Authentication Using EAP-TLS
When Authentication Servers Are Available
When Authentication Servers Are Not
Available
For an 802.1X client that terminates at an external RADIUS
server using EAP-TLS:
l If authentication is accepted, the associated access
credential with the EAP-TLS indicator, in addition to the
Key Reply attributes, are stored in the Survival Server
database.
l If authentication is rejected, the associated access
credential and Key Reply attributes associated with the
EAP-TLS method (if they exist) are deleted from the
Survival Server database.
When there is no available in-service server in the
associated server group, the Survival Server
terminates and authenticates 802.1X clients using
EAP-TLS.
The Survival Server uses the previously stored
unexpired access credential to perform
authentication and, upon successful authentication,
returns the previously stored Key Reply attributes.
In this case, the client station must be configured to
accept the server certificate assigned to the
Survival Server.
802.1X Termination Enabled at the Wireless LAN Controller
For an 802.1X client for which termination is enabled at the wireless LAN controllerusing EAP-TLS with
Common Name (CN) lookup, a query request about the Common Name is sent to the external authentication
server.
Dell Networking W-Series ArubaOS 6.4.x | User Guide BranchController Config for Controllers | 288