11
User and Remote Interface Security Measures
Administrative Password
To reset an instrument’s administrative password, follow the procedure in the
N8900
Operating and Service Guide
. This involves removing power and other connections to
the instrument, removing the instrument cover (requires tools), changing a switch
position, and cycling power. The calibration count will increment when the password is
reset using this method.
The password never expires.
This instrument does not track or report invalid password attempts, nor does it lock-out
password entry following a number of invalid password entries.
Remote Access Interfaces
The user is responsible for providing security for the I/O ports for remote access by
controlling physical access to the I/O ports. The I/O ports must be controlled because
they provide access to all user settings, user states and the display image. The I/O ports
include USB, GPIB, and LAN.
The LAN port provides the following services, which can be selectively disabled:
a)
VXI-11
b)
Sockets
c)
Telnet
d)
Web instrument control
e)
mDNS
To disable LAN services:
On the front panel press the Menu key, then System\IO\LAN\Modify\Services
To disable USB or GPIB:
On the front panel press the Menu key, then System\Admin\ IO
Controlling the front panel display
The front panel display can be turned off from the remote interface by sending the
command:
DISPlay off
The display is enabled when power is cycled.
Calibration regulation
The instrument requires a password to allow calibration. The instrument’s calibration
count will increment each time calibration is saved.
Firmware update regulation
The instrument may be configured to require a password to allow updating the firmware.
On the front panel press the Menu key, then System\Admin\Login
