ZyXEL Communications 1000 User Manual

 Chapter 6 Configuration Basics

ZyWALL USG 1000 User’s Guide

There are many types of interfaces in the ZyWALL. In addition to being used in 
various features, interfaces also describe the network that is directly connected to 
the ZyWALL.

• Ethernet interfaces are the foundation for defining other interfaces and 

network policies. You also configure RIP and OSPF in these interfaces.

• Port groups create a hardware connection between physical ports at the layer-

2 (data link, MAC address) level. 

• PPP interfaces support Point-to-Point Protocols (PPPoE or PPTP). ISP accounts 

are required for PPPoE/PPTP interfaces. 

• VLAN interfaces recognize tagged frames. The ZyWALL automatically adds or 

removes the tags as needed. Each VLAN can only be associated with one 

Ethernet interface.

• Bridge interfaces create a software connection between Ethernet or VLAN 

interfaces at the layer-2 (data link, MAC address) level. Then, you can configure 

the IP address and subnet mask of the bridge. It is also possible to configure 

zone-level security between the member interfaces in the bridge.

• Virtual interfaces increase the amount of routing information in the ZyWALL. 

There are three types: virtual Ethernet interfaces (also known as IP alias), 

virtual VLAN interfaces, and virtual bridge interfaces.

• The auxiliary interface, along with an external modem, provides an interface 

the ZyWALL can use to dial out. This interface can be used as a backup WAN 

interface, for example. The auxiliary interface controls the AUX port.