Radius Server/Secret; Radius Server/Retry Count; Security/Ppp - ADTRAN Express L128T S User Manual

Chapter 3. Terminal Menu Operation

Radius Server/Secret

Write security: 0; Read security: 1
The RADIUS server and Express L128T S/T share this text string,
which is used by the RADIUS server to authenticate the Express L128T
S/T 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 L128T S/T should send a re-
quest packet to the RADIUS server without a response before giving
up. If the number of attempts to communicate with the primary serv-
er 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
default 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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