Chapter 1 Introducing the Zyxel Device
AX/DX/EX/PX Series User’s Guide
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1.2 Example Applications
This section shows a few examples of using the Zyxel Device in various network environments. Note that
the Zyxel Device in the figure is just an example Zyxel Device and not your actual Zyxel Device.
Connect the WAN port to a broadband modem or router for Internet connection. Connect computers
to the Zyxel Device’s LAN ports, or wirelessly, and access the Internet simultaneously.
Figure 1 Zyxel Device’s Internet Access Application
You can also configure Firewall on the Zyxel Device for secure Internet access. When the Firewall is on,
all incoming traffic from the Internet to your network is blocked by default 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.
Figure 2 Zyxel Device’s Internet Access Application: Ethernet WAN
1.2.1 WAN Priority
The WAN connection priority is as follows:
1 SFP
2 Ethernet WAN
3 DSL
4 Cellular WAN (3G/4G)
See Section 1.2.6 on page 25 for more information about Cellular backup.
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