ZyWALL ATP Series User’s Guide
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CHAPTER 9
Interfaces
9.1 Interface Overview
Use the Interface screens to configure the Zyxel Device’s interfaces. You can also create interfaces on
top of other interfaces.
• Ports are the physical ports to which you connect cables.
• Interfaces are used within the system operationally. You use them in configuring various features. An
interface also describes a network that is directly connected to the Zyxel Device. For example, You
connect the LAN network to the LAN interface.
• Zones are groups of interfaces used to ease security policy configuration.
9.1.1 What You Can Do in this Chapter
• Use the Port Role screen (Section 9.2 on page 210) to create port groups and to assign physical ports
and port groups to Ethernet interfaces.
• Use the Ethernet screens (Section 9.3 on page 211) to configure the Ethernet interfaces. Ethernet
interfaces are the foundation for defining other interfaces and network policies. RIP and OSPF are also
configured in these interfaces.
• Use the PPP screens (Section 9.4 on page 233) for PPPoE, PPTP or L2TP Internet connections.
• Use the Cellular screens (Section 9.5 on page 240) to configure settings for interfaces for Internet
connections through an installed mobile broadband card.
• Use the Tunnel screens (Section 9.6 on page 249) to configure tunnel interfaces to be used in Generic
Routing Encapsulation (GRE), IPv6 in IPv4, and 6to4 tunnels.
• Use the VLAN screens (Section 9.7 on page 256) to divide the physical network into multiple logical
networks. VLAN interfaces receive and send tagged frames. The Zyxel Device automatically adds or
removes the tags as needed. Each VLAN can only be associated with one Ethernet interface.
• Use the Bridge screens (Section 9.8 on page 269) to combine two or more network segments into a
single network.
• Use the VTI screens (Section 9.9 on page 282) to encrypt or decrypt IPv4 traffic from or to the interface
according to the IP routing table.
• Use the Trunk screens (Section 9.10 on page 287) to configure load balancing.
9.1.2 What You Need to Know
Interface Characteristics
Interfaces generally have the following characteristics (although not all characteristics apply to each
type of interface).
• An interface is a logical entity through which (layer-3) packets pass.
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