Adtran 4120 用户手册
Chapter 1. Understanding ISDN and the Express 4110/4120
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Express 4110/4120 User Manual
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tion/IP/NAT
menu that allows incoming HTTP, FTP, and mail server
requests from the Internet to be translated and forwarded to this address
on the user network.
on the user network.
Configuration
The Express 4110/4120 is configured using a menu-based interface. This
interface can be accessed via the maintenance port using any asynchro-
nous VT 100 terminal or personal computer running a terminal emula-
tion program, or via the LAN using a Telnet client program. To use the
Telnet interface, the Express 4110/4120 must first have an IP address pro-
grammed into it via the maintenance port. The factory default is 10.0.0.1.
interface can be accessed via the maintenance port using any asynchro-
nous VT 100 terminal or personal computer running a terminal emula-
tion program, or via the LAN using a Telnet client program. To use the
Telnet interface, the Express 4110/4120 must first have an IP address pro-
grammed 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
network. The Express 4110/4120 provides many tools for securing the
local network from hostile users. Incoming calls can be authenticated
using passwords and Caller ID. A RADIUS client can also be used.
network. The Express 4110/4120 provides many tools for securing the
local network 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 authentica-
tion methods. Each menu item in the Express 4110/4120 has a security
level associated 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 3-7 (in Chapter 3) for more information on
menu security levels.
tion methods. Each menu item in the Express 4110/4120 has a security
level associated 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 3-7 (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.
being transferred from LAN-to-WAN, WAN-to-LAN, or WAN-to-WAN.