Layer 2 Isolation; Overview; What You Can Do In This Chapter; Chapter 18 Layer 2 Isolation - ZyXEL Communications USG40 User Manual

18.1 Overview

Layer-2 isolation is used to prevent connected devices from communicating with each other in the
ZyWALL/USG's local network(s), except for the devices in the white list, when layer-2 isolation is
enabled on the ZyWALL/USG and the local interface(s).
Note: The security policy control must be enabled before you can use layer-2 isolation.
In the following example, layer-2 isolation is enabled on the ZyWALL/USG's interface Vlan1. A
printer, PC and AP are in the Vlan1. The IP address of network printer (C) is added to the white list.
With this setting, the connected AP then cannot communicate with the PC (D), but can access the
network printer (C), server (B), wireless client (A) and the Internet.
Figure 298 Layer-2 Isolation Application

18.1.1 What You Can Do in this Chapter

• Use the General screen
USG and the internal interface(s).
• Use the White List screen
C
HAPTER
(Section 18.2 on page 424) to enable layer-2 isolation on the ZyWALL/
(Section 18.3 on page 424) to enable and configures the white list.
ZyWALL/USG Series User's Guide
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Layer 2 Isolation

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