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P-334U/P-335U User’s Guide
246 Appendix A Product Specifications
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 earlier
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.
Activate UPnP to have the ZyXEL Device communicate with other UPnP-
enabled devices in a network.
RoadRunner Support The ZyXEL Device supports Time Warner’s RoadRunner Service in
addition to standard cable modem services.
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 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.
Table 92 Firmware Specifications
FEATURE DESCRIPTION