User Manual
Level 0: Disable logging (default)
Level 1: Log LOGIN, LOGOUT and SIGNAL events
Level 2: Log LOGIN, LOGOUT, SIGNAL, TXDATA and RXDATA events
Level 3: Log LOGIN, LOGOUT, SIGNAL and RXDATA events
Level 4: Log LOGIN, LOGOUT, SIGNAL and TXDATA events
Input/RXDATA is data received by the Opengear device from the connected serial device, and
output/TXDATA is data sent by the Opengear device (e.g. typed by the user) to the connected
serial device.
Device consoles typically echo back characters as they are typed so TXDATA typed by a user is
subsequently received as RXDATA, displayed on their terminal.
NOTE:
After prompting for a password, the connected device sends * characters to prevent the
password from being displayed.
Telnet
When the Telnet service is enabled on the console server, a Telnet client on a user’s computer can
connect to a serial device attached to this serial port on the console server. Because Telnet
communications are unencrypted, this protocol is only recommended for local or VPN tunneled
connections.
If the remote communications are being tunneled with SDT Connector, Telnet can be used for
securely accessing these attached devices.
NOTE
In console server mode, users can use SDT Connector to set up secure Telnet connections that
are SSH tunneled from their client computers to the serial port on the console server. SDT
Connector can be installed on Windows PCs and most Linux platforms and it enables secure
Telnet connections to be selected with point-and-click.
To use SDT Connector to access consoles on the console server serial ports, configure SDT
Connector with the console server as a gateway, and as a host, and enable Telnet service on Port
(2000 + serial port #) i.e. 2001–2048.
You can also use standard communications packages like PuTTY to set a direct Telnet or SSH connection
to the serial ports.
NOTE
In Console server mode, when you connect to a serial port you connect via pmshell. To generate a
BREAK on the serial port, type the character sequence ~b. If you’re doing this over OpenSSH type
~~b.
SSH
It is recommended that you use SSH as the protocol when users connect to the console server
(or connect through the console server to the attached serial consoles) over the Internet or any
other public network.
For SSH access to the consoles on devices attached to the console server serial ports, you can
use SDT Connector. Configure SDT Connector with the console server as a gateway, and as a
host, and enable SSH service on Port (3000 + serial port #) i.e. 3001-3048.
You can also use common communications packages, like PuTTY or SSHTerm to SSH connect
to port address IP Address _ Port (3000 + serial port #) i.e. 3001–3048
SSH connections can be configured using the standard SSH port 22. The serial port being
accessed is identified by appending a descriptor to the username. This syntax supports:
<username>:<portXX>
