Chapter 1: Understanding ISDN and the Express XL/XLT
be assigned under the Configuration/IP/NAT menu that allows incoming HT- TP, FTP, and mail server requests from the Internet to be translated and for- warded to this address on the user network.
Configuration
The Express XL/XLT is configured using a
Security
Security on network devices is a major concern for almost anyone with a net- work. The Express XL/XLT provides many tools for securing the local net- work from hostile users. Incoming calls can be authenticated using passwords 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 XL/XLT has a security level associ- ated 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 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
20 | Express XL/XLT User Manual |
