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Chapter 3. Terminal Menu Operation and Structure
Radius Server/UDP Port
Write security: 1; Read security: 2
This is the UDP port that the Express L768 should use when commu-
nicating with the RADIUS server. The default is 1645, which is the
commonly used port.
Radius Server/Secret
Write security: 0; Read security: 1
The RADIUS server and Express L768 share this text string, which is
used by the RADIUS sever to authenticate the Express L768 that is the
RADIUS client. The factory default is not to use a secret.
Radius Server/Retry Count
Write security: 1; Read security: 2
This is the number of times the Express L768 should send a request
packet to the RADIUS server without a response before giving up. If
the number of attempts to communicate with the primary server is
equal to the retry count, the secondary server (if defined) is tried. If
the secondary server does not respond within the retry count, the PPP
peer (or Telnet session) is not authenticated and is dropped. The de-
fault is 5.
»» Security/PPP
Write security: 1; Read security: 2
The PPP peer can be authenticated using three standard methods:
PAP (Password Authentication Protocol), CHAP (Challenge Hand-
shake Protocol) and EAP (Extensible Authentication Protocol). The
strength of the authentication is determined in the order EAP, CHAP,
followed by PAP, where EAP is the strongest and PAP is the weakest.
PAP is a clear-text protocol, which means it is sent over the PPP link
in a readable format. Care must be taken not to allow highly sensitive
passwords to become compromised using this method. CHAP and
EAP use a one-way hashing algorithm which makes it virtually im-
possible to determine the password. EAP has other capabilities which
allow more flexibility than CHAP.
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Express L768 User Manual
61203192L1-20
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