Chapter 1 Introducing the Zyxel Device
AX/DX/EX/PX Series User’s Guide
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• connecting the SFP port to your ISP with an Ethernet or fiber optic cable through an SFP transceiver.
For Zyxel Devices that support both DSL/Ethernet WAN port and SFP port, see Section 1.2.2 on page 24
for WAN connection priority.
Computers can connect to the Zyxel Device’s LAN ports (or wirelessly) and access the Internet
simultaneously.
Figure 2 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.
Connect the WAN port to the broadband modem or router. This way, you can access the Internet
through an Ethernet connection and use the QoS, Firewall and parental control functions on the Zyxel
Device.
Figure 3 Zyxel Device’s Internet Access Application: Ethernet WAN
1.2.2 WAN Priority
The WAN connection priority is as follows:
1 SFP
2 Ethernet WAN
3 DSL
4 Cellular WAN (3G/4G)
See Section 1.3 on page 28 for more information about Cellular backup.
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