NCast Presentation Recorder Reference Manual
If the audio meter is displayed (on the local loopback screen) the current IP address of the unit will be shown
with the meter, allowing verification of the unit’s address.
3.7. T
ELNET
S
ETTINGS
The Telnet Configuration page is used to enable the Telnet Serial Interface to the unit, an interface, which
may be used to send and receive command and control, strings over IP-based networks. See the Serial
Interface Specification Manual for complete information on the serial command interfaces.
If the interface is enabled, secure the interface with a unique and non-dictionary password, and configure the
IP restriction field to only allow the IP address of the controller unit to command the Presentation Recorder.
Note that for security reasons the default Telnet port is not utilized.
3.7.1. Telnet Access
Disable access if the serial command interface is not in use.
3.7.2. Password
Choose a password, which has random characters and numbers and is at least 8 characters in length.
Unfortunately, Telnet protocol sends this password in clear-text, so network sniffers may be able to
compromise this entry.
3.7.3. IP restriction
This limits the valid IP addresses, which may send commands to the Presentation Recorder. Normally this
field should contain a single IP address, which is the IP of the controller in charge of the Presentation
Recorder. Thus, if the password is compromised an attacker will still not gain access to the unit. This field
may contain:
www.xxx.yyy.zzz
A single address
www.xxx.yyy.*
An address range
www.xxx.yyy.0/24
A subset of a network (CIDR notation)
www.xxx.yyy.zzz,sss.ttt.uuu.vvv
A comma-separated list of addresses
NCast Corporation
Revision 1.1
Page 29
