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Operator's guide
To remove a user account, choose their username from the drop-down box
below Existing accounts and click Delete user. If you delete your own account,
you will no longer be able to log in to the DCM, although you may finish what
you are doing in the current session.
You can also change the password for any account, for example if you believe it
to have been compromised, or if you are assigning it to a new person. To do
this, choose their username from the same drop-down box and repeat the new
password in the two boxes at the bottom of the page. Again, the password will
not be visible on screen. Click Change password to make the change.
PPP
This submenu allows you to alter the PPP configuration files,
/etc/ppp/options and /etc/ppp/chap-secrets. These two files
are required by the Linux PPP server, and affect all ppp services on the DCM.
(Separate options for each port may be specified under Serial port
configuration; see Section 4.3, “Serial port configuration”).The
/etc/ppp/chap-secrets file is only necessary if you are using CHAP to
authenticate PPP connections.
Clicking on either of these entries brings up a page in the work area which
enables you to edit the file and its attributes directly, including
• the ownership of the file;
• the permissions (read, write, or execute) of the file for its own user, its
own group, and all others; and
• the content of the file.
The Web interface does not check that the content of the files will be
understood. You should ensure that the file is valid before committing any
changes, referring to the Linux manual page for pppd(8) if you are unsure.
When you have finished editing a file, clicking Save changes will write the
changes to disk. The changes will not take effect, however, until the PPP
services are restarted. You can restart all running PPP services by clicking
Restart PPP; whilst this occurs, the network will be briefly unavailable.
options
The file /etc/ppp/options sets the default options for the PPP daemon.
These will be applied to all PPP connections and to any of the serial ports which
are running the ppp service. The file is treated as a list of words, each either an
option or an argument to a previous option. For a list of the available options,
and a full explanation of the format of the /etc/ppp/options file, see the
Linux manual page for pppd(8).
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