ZyXEL Communications ZyWALL 10, Руководство пользователя

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ZyWALL 10 Internet Security Gateway
1-2 Getting to Know Your ZyWALL
Dynamic DNS Support
With Dynamic DNS support, you can have a static hostname alias for a dynamic IP address, allowing the
host to be more easily accessible from various locations on the Internet. You must register for this service
with a Dynamic DNS client to use this service.
IP Multicast
Traditionally, IP packets are transmitted in two ways - unicast or broadcast. Multicast is a third way to
deliver IP packets to a group of hosts. IGMP (Internet Group Management Protocol) is the protocol used to
support multicast groups. The latest version is version 2 (see RFC 2236). Both versions 1 and 2 are
supported by the ZyWALL.
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 interface with the
ZyWALL itself as the gateway for each LAN network.
SNMP
SNMP (Simple Network Management Protocol) is a protocol used for exchanging management information
between network devices. SNMP is a member of 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).
Auto-negotiating 10/100Mbps Ethernet
The LAN interface automatically detects if it’s on a 10 or a 100 Mbps Ethernet.
Network Address Translation (NAT)
NAT (Network Address Translation - NAT, RFC 1631) allows the translation of an Internet Protocol address
used within one network to a different IP address known within another network.
DHCP (Dynamic Host Configuration Protocol)
The ZyWALL supports DHCP Server and Client (RFC 2131 and RFC 2132). The ZyWALL's DHCP server
capability allows you to automatically assign TCP/IP settings to a workstation on your LAN. The ZyWALL's
DHCP client capability allows it to get automatically its IP address from the ISP on the WAN.
Full Network Management
This feature allows you to access SMT (System Management Terminal) through the console port or telnet
connection.
RoadRunner Support
In addition to standard cable modem services, the ZyWALL supports Time Warner’s RoadRunner Service.
Time and Date Setting
This new feature ( Menu 24.10) allows you to get the current time and date from an external server when you
power up your ZyWALL. The real time is then displayed in the ZyWALL error logs and firewall logs. If you