ZyXEL Communications P-660RU-T1 v3, Руководство пользователя, Страница: 168 / 230

Chapter 26 Product Specifications
P-660RU-Tx v3 User’s Guide
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Configuration Backup &
Restoration
Make a copy of the ZyXEL Device’s configuration. You can put it back on
the ZyXEL Device later if you decide to revert back to an earl i er
configuration.
Network Address
Translation (NAT)
Each computer on your network must have its own unique IP address. Use
NAT to convert your public IP address(es) to multiple private IP addresses
for the computers on your network.
Port Forwarding If you have a server (mail or web server for example) on your network, you
can use this feature to let people access it from the Internet.
DHCP (Dynamic Host
Configuration Protocol)
Use this feature to have the ZyXEL Device assign IP addresses, an IP
default gateway and DNS servers to computers on your network. Your
device can also act as a surrogate DHCP server (DHCP Relay) where it
relays IP address assignment from the actual real DHCP server to the
clients.
Dynamic DNS Support With Dynamic DNS (Domain Name System) support, you can use a fixed
URL, www.zyxel.com for example, with a dynamic IP address. You must
register for this service with a Dynamic DNS service provider.
IP Multicast IP multicast is used to send traffic to a specific group of computers. The
ZyXEL Device supports versions 1 and 2 of IGMP (Internet Group
Management Protocol) used to join multicast groups (see RFC 2236).
Time and Date Get the current time and date from an external server when you turn on your
ZyXEL Device. You can also set the time manually. These dates and times
are then used in logs.
Logs Use logs for troubleshooting.
Universal Plug and Play
(UPnP)
A UPnP-enabled device can dynamically join a network, obtain an IP
address and convey its capabilities to other devices on the network.
Firewall Your device has a stateful inspection firewall with DoS (Denial of Service)
protection. By default, when the firewall is activated, all incoming traffic from
the WAN to the LAN is blocked unless it is initiated from the LAN.
IP/MAC Address Filters Your device’s packet filtering function allows added network security and
management.
Application Filter Application filter allows you to block instant messaging programs.
URL Filter URL filter allows you to block access to Internet web sites that contain key
words (that you specify) in the URL.
QoS (Quality of Service) You can efficiently manage traffic on your network by reserving bandwidth
and giving priority to certain types of traffic and/or to particular computers.
Remote Management This allows you to decide whether a service (HTTP or FTP traffic for
example) from a computer on a network (LAN or WAN for example) can
access the ZyXEL Device.
PPPoE Support
(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
your device 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.
Other PPPoE Features PPPoE idle time out
PPPoE dial on demand
Multiple PVC
(Permanent Virtual
Circuits) Support
Your device supports up to 8 Permanent Virtual Circuits (PVCs).
Table 48 Firmware Specifications (continued)