Nortel Networks WEB OS 212777 - Manual (Page 239)

Web OS 10.0 Application Guide
Chapter 10: Health Checking n 239
212777-A, February 2002
RADIUS Server Health Checks
The Remote Authentication Dial-In User Service (RADIUS) protocol is used to authenticate
dial-up users to Remote Access Servers (RASs) and the client application they will use during
the dial-up connection.
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RADIUS Content Health Check Enhancements
o Include the switch IP as the Network-attached storage (NAS) IP parameter in the
RADIUS content health check
o RADIUS health check using the configured real server port ( rport)
o Variable-length RADIUS secret password. Supports less than 16 octets and up to 32
octets
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The secret value is a field of up to 32 alphanumeric characters used by the switch to
encrypt a password during the RSA Message Digest Algorithm (MD5) and by the
RADIUS server to decrypt the password during verification.
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The content option specifies the username:password value that the server tries to
match in its user database. In addition to verifying the user name and password, the data-
base may specify the client(s) or port(s) the user is allowed to access.
N OTE – Network-attached storage (NAS) is hard disk storage that is set up with its own net-
work address rather than being attached to the department computer that is serving applications
to a network’s workstation users. By removing storage access and its management from the
department server, both application programming and files can be served faster because they
are not competing for the same processor resources. The network-attached storage device is
attached to a local area network (typically, an Ethernet network) and assigned an IP address.
File requests are mapped by the main server to the NAS file server.
Configuring the Switch for RADIUS Server Content Health Checks
The Alteon Web switch will provide the NAS IP parameter while performing RADIUS content
health checks. The switch uses the IP address of the IP interface that is on the same subnet as
the RADIUS server or the default gateway as the NAS IP.
The RADIUS health check is performed using the configured real server port ( rport ). To
configure RADIUS health checks, use the /cfg/slb/virt <#> /service menu.