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Black Box Console Server user guide 107
framed
compression
(use only when the user service field is set to ‘slip’ or ‘ppp’) this parameter
determines whether Van Jacobsen Compression is used on the link. Select either ‘on’
or ‘off’ (default is ‘off’). VJ compression is a means of reducing the standard TCP/IP
header from 40 octets to approximately 5 octets. This gives a significant performance
improvement particularly when interactive applications are being used. Such an
application is typing, where a single character can be passed over the link with a 40
octet header attached. VJ Compression has little effect on other types of link, such as
ftp, where the packets are much larger.
The framed compression value will be used in preference to the VJ compression
values set for a line; see Configuring SLIP on page 78 or Configuring PPP on page 82.
If you set up any restricted users, you must predefine their sessions; they can only
open sessions predefined for them by the admin user.
About user levels
There are four user levels which can be used to determine the level of access the user
has to Console Server commands:
Admin the system administrator. The admin user has total access to the unit.
You can create more than one admin user account but we recommend
that you only have one.
Normal (default) normal users have access to the Sessions menu only. They can start
sessions, predefine sessions and change their own user environment.
Restricted these users have access to a restricted Sessions menu; they can only
open sessions predefined for them by the admin user. Predefined
sessions can even be configured to start automatically at login.
Menuing only be able to initiate sessions defined for that user. All other
functionality is barred.
Note: When users are authenticated by a Radius host, each user will be entitled to
Normal user level access.
CLI prompts
For admin users, the cli prompt is followed by a hash sign, for example xxxxxx#. For
normal and restricted users the prompt will be followed by a dollar or pound sign, for
example xxxxxx$. The display of a dollar or pound sign will vary according to the
characters supported by your terminal.