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ZyWALL 2 Series User's Guide
Central Network Management
Central Network Management (CNM) allows an enterprise or service provider network administrator to
manage your ZyWALL. The enterprise or service provider network administrator can configure your
ZyWALL, perform firmware upgrades and do troubleshooting for you.
SNMP
SNMP (Simple Network Management Protocol) is a protocol used for exchanging management information
between network devices. SNMP is a member of the TCP/IP protocol suite. Your ZyWALL supports SNMP
agent functionality, which allows a manager station to manage and monitor the ZyWALL through the
network. The ZyWALL supports SNMP version one (SNMPv1).
Network Address Translation (NAT)
NAT (Network Address Translation - NAT, RFC 1631) allows the translation of multiple IP addresses used
within one network to different IP addresses known within another network.
Traffic Redirect
Traffic Redirect forwards WAN traffic to a backup gateway when the ZyWALL cannot connect to the
Internet, thus acting as an auxiliary backup when your regular WAN connection fails.
Port Forwarding
Use this feature to forward incoming service requests to a server on your local network. You may enter a
single port number or a range of port numbers to be forwarded, and the local IP address of the desired server.
DHCP (Dynamic Host Configuration Protocol)
DHCP (Dynamic Host Configuration Protocol) allows the individual client computers to obtain the TCP/IP
configuration at start-up from a centralized DHCP server. The ZyWALL has built-in DHCP server
capability, enabled by default, which means it can assign IP addresses, an IP default gateway and DNS
servers to all systems that support the DHCP client. The ZyWALL can also act as a surrogate DHCP server
(DHCP Relay) where it relays IP address assignment from another DHCP server to the clients.
Shared Internet Access
Computers connected to the LAN-side of the ZyWALL can have simultaneous access to the Internet.
Inactive connections are dropped after a specified idle timeout (see Configuring WAN ISP).
Full Network Management
The embedded web configurator is an all-platform web-based utility that allows you to easily access the
ZyWALL's management settings and configure the firewall. The ZyWALL also provides the SMT (System
Getting to Know Your ZyWALL
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