ADTRAN Express L1.5, User Manual

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Chapter 1: Understanding HDSL and the Express L768/L1.5
12 Express L768/L1.5 User Manual 61202192L1-1
Security
Security on network devices is a major concern for almost anyone with a net-
work. The Express L768/L1.5 provides many tools for securing the local net-
work from hostile users. Connections can be authenticated using passwords.
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 L768/L1.5 has a security level asso-
ciated with it. A telnet session is assigned a privilege level which determines
which menu items are accessible to the telnet client. See Security Levels on
page 21 (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.