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P-334U/P-335U User’s Guide
32 Chapter 1 Getting to Know Your ZyXEL Device
The ZyXEL Device guarantees not only high speed Internet access, but secure internal
network protection and traffic management as well.
Figure 1 Secure Internet Access via Cable or DSL Modem
You can also configure firewall and content filtering on the ZyXEL Device for secure Internet
access. When the firewall is on, 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.
Use content filtering to block access to web sites containing keywords that you specify. You
can define time periods and days during which content filtering is enabled and include or
exclude particular computers on your network from content filtering. For example, you could
block access to certain web sites for the kids.
Use bandwidth management to efficiently manage traffic on your network by giving priority
to certain types of traffic and/or to particular computers. For example, you could make sure
that voice over Internet calls get enough bandwidth in your network, and/or limit bandwidth
devoted to the boss’s excessive file downloading.
1.2.2 Wireless LAN Application
Add a wireless LAN to your existing network without expensive network cables. Wireless
clients can move freely anywhere in the coverage area and use resources on the wired network.
Figure 2 WLAN Application Example