ZyXEL 793H Guía Del Usuario
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Appendix A Product Specifications
P-793H User’s Guide
363
Table 137 Firmware Features
FEATURE
DESCRIPTION
Firmware Upgrade
Download new firmware (when available) from the ZyXEL web site and
use the web configurator, an FTP or a TFTP tool to put it on the ZyXEL
Device.
Note: Only upload firmware for your specific model!
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.
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).
IP Alias
IP alias allows you to subdivide a physical network into logical networks
over the same Ethernet interface with the ZyXEL Device itself as the
gateway for each subnet.
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.
Logging and Tracing
Use packet tracing and logs for troubleshooting. You can send logs from
the ZyXEL Device to an external syslog server.
PPPoE
PPPoE mimics a dial-up Internet access connection.
PPTP Encapsulation
Point-to-Point Tunneling Protocol (PPTP) enables secure transfer of
data through a Virtual Private Network (VPN). The ZyXEL Device
supports one PPTP connection at a time.
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
You can configure firewall on the ZyXEL Device for secure Internet
access. When the firewall is on, by default, all incoming traffic from the
Internet to your network is blocked unless it is initiated from your
network. This means that probes from the outside to your network are
not allowed, but you can safely browse the Internet and download files
for example.
Content Filter
The ZyXEL Device blocks or allows access to web sites that you specify
and blocks access to web sites with URLs that contain keywords that
you specify. You can define time periods and days during which content
filtering is enabled. You can also include or exclude particular computers
on your network from content filtering.