ZyXEL Communications ZyXEL ZyAIR 100 - Manual (Page 37)

ZyWALL 10~100 Series Internet Security Gateway
Getting to Know Your ZyWALL 1-5
IP Multicast
Deliver IP packets to a specific group of hosts using IP multicast. IGMP (Internet Group Management
Protocol) is the protocol used to support multicast groups. The latest version is version 2 (see RFC 2236); the
ZyWALL supports both versions 1 and 2.
IP Alias
IP Alias allows you to partition a physical network into logical networks over the same Ethernet interface.
The ZyWALL supports three logical LAN interfaces via its single physical Ethernet LAN interface with the
ZyWALL itself as the gateway for each LAN network.
IP Policy Routing
IP Policy Routing provides a mechanism to override the default routing behavior and alter packet forwarding
based on the policies defined by the network administrator. This feature is not available on all models.
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)
Network Address Translation (NAT) allows the translation of an Internet protocol address used within one
network (for example a private IP address used in a local network) to a different IP address known within
another network (for example a public IP address used on the Internet).
Traffic Redirect
Traffic Redirect forwards WAN traffic to a backup gateway on the LAN when the ZyWALL cannot connect
to the Internet, thus acting as an auxiliary backup when your regular WAN connection fails. This feature is
not available on all models.
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