Dial-Out; Dial-Back - Lantronix 100-120 VAC SLB User Manual

SLB unit until they either logout of the CLI session, or (if Timeout Logins is enabled) the CLI
session is terminated if it has been idle.
For PPP connections, the user will be authenticated via PAP or CHAP (configured with the

Authentication setting). For PAP, the Local/Remote User list will be used to authenticate the
login and password sent by the PPP peer. For CHAP, the CHAP Handshake Host/User Name
and Secret/User Password will be used to authenticate the CHAP Challenge response sent by
the PPP peer. If the remote peer requests PAP or CHAP authentication from the SLB unit, the
Remote/Dial-out Login and Remote/Dial-out Password will be provided as authentication
tokens. Once authenticated, a PPP session will be established using either negotiated IP
addresses or specific IP addresses (determined by the Negotiate IP Address setting). The
PPP connection will stay active until no IP traffic is sent for Modem Timeout seconds.

Dial-Out

The SLB unit dials a remote peer to establish a PPP connection. The SLB device dials the Dial-out
Number, and if the remote peer requests PAP or CHAP authentication, provides the Remote/Dial-
out Login and Remote/Dial-out Password as authentication tokens. Once authenticated, a PPP
session will be established using either negotiated IP addresses or specific IP addresses
(determined by the Negotiate IP Address setting).

Dial-Back

The SLB unit waits for a peer to call the device, establishes a text (command line) or PPP
connection, authenticates the user, and if the SLB unit is able to determine a dial-back number to
use, hangs up and calls the dial-back number to establish either a text or PPP connection.
For text connections, the user will be prompted for a login and password, and will be

authenticated via the currently enabled authentication methods (Local Users, NIS, LDAP, etc).
Once authenticated, the SLB unit will use the Dial-back Number configured for the modem -
either a fixed number assigned to the modem, or a number associated with the user that was
authenticated (the user must have Allow Dial-back enabled and a Dial-back Number defined).
If the SLB device can determine a dial-back number to use, it will hang up and wait Dial-back
Delay seconds before initiating the dial-back. The SLB unit will dial, prompt the user again for
a login and password, and a CLI session will be initiated (if the dial-back fails, the SLB unit will
try Dial-back Retries times to dial-back). The user will remain connected to the SLB unit until
they either logout of the CLI session, or (if Timeout Logins is enabled) the CLI session is
terminated if it has been idle.
Special SLM (Secure Lantronix Management Appliance) Text Dial-back support. When the

SLM unit is configured for SLB unit callback support, the SLM device dials the SLB. The SLM
will provide the callback number in a text string (DIALBACK #) to the modem that the SLM it is
currently using. The SLB will hang up and wait Dial-back Delay seconds before initiating the
dial-back to the SLM unit using the phone number provided above.
For PPP connections, the user will be authenticated via PAP or CHAP (configured with the

Authentication setting). For PAP, the Local/Remote list will be used to authenticate the login
and password sent by the PPP peer. For CHAP, the CHAP Handshake Host/User Name and
Secret/User Password will be used to authenticate the CHAP Challenge response sent by the
PPP peer. If the remote peer requests PAP or CHAP authentication from the SLB device, the
Remote/Dial-out Login and Remote/Dial-out Password will be provided as authentication
tokens. Once authenticated, the SLB unit will use the Dial-back Number configured for the
modem - either a fixed number assigned to the modem, or a number associated with the user
that was authenticated (the user must have Allow Dial-back enabled and a Dial-back Number
defined). If the SLB device can determine a dial-back number to use, it will hang up and wait
SLB™ Branch Office Manager User Guide
8: Device Ports
168