ADTRAN Express L128, User Manual

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Chapter 1: Understanding ISDN and the Express L128/L128T
20 Express L128/L128T User Manual 61202.070L1-1
incoming HTTP, FTP, and mail server requests from the Internet to be trans-
lated and forwarded to this address on the user network.
Configuration
The Express L128/L128T is configured using a menu-based interface. This in-
terface can be accessed via the maintenance port using any asynchronous VT
100 terminal or personal computer running a terminal emulation program, or
via the LAN using a Telnet client program. To use the Telnet interface, the Ex-
press L128/L128T must first have an IP address programmed into it via the
maintenance port. The factory default is 10.0.0.1.
Security
Security on network devices is a major concern for almost anyone with a net-
work. The Express L128/L128T provides many tools for securing the local
network from hostile users. Incoming calls can be authenticated using pass-
words and Caller ID. A RADIUS client can also be used.
The Telnet configuration can also be protected using the same authentication
methods. Each menu item in the Express L128/L128T has a security level as-
sociated with it. A Telnet session is assigned a privilege level which deter-
mines which menu items are accessible to the Telnet client. See Security Levels
on page 33 (in Chapter 3) for more information on menu security levels.
Filters can be defined to prevent certain addresses or protocols from being
transferred from LAN-to-WAN, WAN-to-LAN, or WAN-to-WAN.