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be managed over any public network (e.g. the Internet). This ensures the
Administrator has secure browser access to all the menus on the console server. It
also allows appropriately configured Users secure browser access to selected
Manage menus. For information on certificate and user client software configuration,
refer to Chapter 9 - Authentication.
The HTTPS service can be completely disabled (or re-enabled) by checking HTTPS
Web Management and an alternate port specified (default port is 443).
Telnet By default the Telnet service is running. However, by default the service is disabled on
all network interfaces.
Telnet can be used to give the Administrator access to the system command line
shell. While this may be suitable for a local direct connection over a management
LAN, we recommend that this service be disabled if the console server will be
remotely administered. This service may also be useful for local Administrator and the
User access to selected serial consoles.
The Enable telnet command shell checkbox will completely enable or disable the
telnet service. An alternate telnet port to listen on can be specified in Alternate Telnet
Port (default port is 23).
SSH This service provides secure SSH access to the console server and attached devices
– and by default the SSH service is running and enabled on all interfaces. We
recommend that you choose SSH as the protocol where the Administrator connects to
the console server over the Internet or any other public network. This will provide
authenticated communications between the SSH client program on the remote
computer and the SSH sever in the console server. For more information on SSH
configuration refer Chapter 9 - Authentication.
The Enable SSH command shell checkbox will completely enable or disable this
service. An alternate SSH port to listen on can be specified in SSH command shell
port (default port is 22).
Enable and configure other services:
TFTP/FTP If a USB flash card or internal flash is detected on an advanced console server
(LES1508A or LES1200/LES1300/LES1400 series), then checking Enable TFTP
(FTP) service will enable this service and set up default tftp and ftp server on the
USB flash. These servers are used to store config files, maintain access and
transaction logs, etc. Files transferred using tftp and ftp will be stored under
/var/tmp/usbdisk/tftpboot. Unchecking Enable TFTP (FTP) service will completely
disable the TFTP (FTP) service.
DNS Relay Checking Enable DNS Server/Relay will enable the DNS relay feature so clients
can be configured with the console server's IP for their DNS server setting, and the
console server will forward the DNS queries to the real DNS server.
Web Terminal Checking Enable Web Terminal will allow web browser access to the system
command line shell via Manage -> Terminal.
Specify alternate port numbers for Raw TCP, direct Telnet/SSH and unauthenticated Telnet
services. The console server uses specific default ranges for the TCP/IP ports for the various
access services that Users and Administrators can use to access devices attached to serial ports
(as covered in Chapter 4 – Configure Serial Ports). The Administrator can also set alternate
ranges for these services, and these secondary ports will then be used in addition to the defaults.
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