Omnitronix Data-Link DL100, Руководство пользователя

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Chapter 2 - What is a DL100?
Manual Rev. 1.02 Page 13
support). It can use the internal modem to perform either a numeric page or command processor
callout.
2.6 - Security
Callback Security
Omnitronix cares deeply about the security of the data within and devices connected to our
products. To that end, there are several key security features available on the DL100:
Callback security allows an administrator to strictly limit the phone numbers allowed access to the
unit. This is accomplished via an exclusive set of outbound phone numbers that have access.
When a user attempts to connect to the unit via modem, they must enter a password. If the
password is valid, the unit disconnects the call and then calls a phone number predefined for that
password. The computer at the callback number is then issued the same password prompt. This
method of callback security puts the system administrator in charge of which modems are allowed
access to the device.
No Network Proxy
The DL100 does not perform any sort of network proxy action. At no time is a user connected via
any means able to directly interact with other devices on the same network. The only outbound
network access the DL100 allows is PING and FTP push.
Password Protection
The DL100 has two different access levels available: user and administrator. The unit allows for
up to four different user-level passwords. Each of these passwords allows only a limited set of
commands and no access to the setup menu. All user-level passwords can be associated with a
security callback number, if desired. There is only one system administrator password. This
password allows for unfettered access to all of the features of the unit, so this password should be
kept very secure.
Access to any of the following features can be controlled by a password:
•
Serial, Telnet, or modem command mode
•
Command mode system administrator
• Pass-through port access
•
Internal FTP server
Using the USER or SUPER commands allow a person already logged on to the device to switch
between user and system administrator privileges. The USER command switches to user level
with no prompt, while SUPER requires the sys admin password.
Further security is gained by character blocking on password inputs. Asterisks are placed on the
screen in place of each character typed. In order for this security feature to work properly, both
the DL100 and the terminal used to access it need to be configured for full duplex (no local echo).