ZyXEL Communications Prestige 661H Series, User Manual

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Prestige 661H/HW Series User’s Guide
45 Chapter 1 Getting To Know Your Prestige
PPPoE (RFC2516)
PPPoE (Point-to-Point Protocol over Ethernet) emulates a dial-up connection. It allows your
ISP to use their existing network configuration with newer broadband technologies such as
ADSL. The PPPoE driver on the Prestige is transparent to the computers on the LAN, which
see only Ethernet and are not aware of PPPoE thus saving you from having to manage PPPoE
clients on individual computers. The Prestige also includes PPPoE idle time-out (the PPPoE
connection terminates after a period of no traffic that you configure) and PPPoE Dial-on-
Demand (the PPPoE connection is brought up only when an Internet access request is made).
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).
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 service provider.
DHCP
DHCP (Dynamic Host Configuration Protocol) allows the individual clients (computers)
to obtain the TCP/IP configuration at start-up from a centralized DHCP server. The
Prestige has built-in DHCP server capability enabled by default. It can assign IP
addresses, an IP default gateway and DNS servers to DHCP clients. The Prestige can now
also act as a surrogate DHCP server (DHCP Relay) where it relays IP address assignment
from the actual real DHCP server to the clients.
IP Alias
IP Alias allows you to partition a physical network into logical networks over the same
Ethernet interface. The Prestige supports three logical LAN interfaces via its single
physical Ethernet interface with the Prestige itself as the gateway for each LAN network.
IP Policy Routing (IPPR)
Traditionally, routing is based on the destination address only and the router takes the
shortest path to forward a packet. IP Policy Routing (IPPR) provides a mechanism to
override the default routing behavior and alter the packet forwarding based on the policy
defined by the network administrator.
Packet Filters
The Prestige's packet filtering functions allows added network security and management.