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Black Box Console Server user guide 103
255.255.255.255 - specified by user. The unit will prompt the user for an IP address
or hostname, when the telnet or rlogin service is started. When the user service is set
to Telnet, Rlogin or TCP Clear, the unit will give the user two attempts the enter the
required information.
n.n.n.n - (where ‘n’ is a number) you specify in this field the IP address of a host with
which the unit should start the telnet or rlogin service for this user.
callback (callback for a user is also known as FIXED callback) the values are either ‘on’ or
‘off’ (default is off). When ‘on’ enter a phone number for the unit to call the user
back; see the field ‘phone number’; (the callback setting is unrelated to the ‘dial’
parameter you can set for a line).
Note: the unit will only allow callback when a user is authenticated. If the protocol
over the link does not provide authentication there will be no callback. Hence, when
the line service is set to ‘PPP’ you must use either PAP or CHAP (see Configuring
PPP on page 82, sub-section ‘Security’), because these protocols provide
authentication.
For a diagrammatic view of callback, see Callback for a user on page 105. Note that
the unit supports another type of callback - ROAMING callback - which is
configurable for a line when you are using the PPP protocol; see Configuring PPP on
page 82.