Ip/Mac Binding; Chapter 20 Ip/Mac Binding; Ip/Mac Binding Overview; What You Can Do In This Chapter - ZyXEL Communications ZYWALL USG 20 Manual

C
H A P T E R

20.1 IP/MAC Binding Overview

IP address to MAC address binding helps ensure that only the intended devices get
to use privileged IP addresses. The ZyWALL uses DHCP to assign IP addresses and
records to MAC address it assigned each IP address. The ZyWALL then checks
incoming connection attempts against this list. A user cannot manually assign
another IP to his computer and use it to connect to the ZyWALL.
Suppose you configure access privileges for IP address 192.168.1.27 and use
static DHCP to assign it to Tim's computer's MAC address of 12:34:56:78:90:AB.
IP/MAC binding drops traffic from any computer trying to use IP address
192.168.1.27 with another MAC address.
Figure 216 IP/MAC Binding Example
Bob
Jim

20.1.1 What You Can Do in this Chapter

• Use the Summary and Edit screens
addresses to MAC addresses.
• Use the Exempt List screen
IP addresses to which the ZyWALL does not apply IP/MAC binding.
ZyWALL USG 20/20W User's Guide

IP/MAC Binding

MAC: 12:34:56:78:90:AB
IP: 192.168.1.27
MAC: AB:CD:EF:12:34:56
IP: 192.168.1.27
(Section 20.2 on page
(Section 20.3 on page
20
360) to bind IP
363) to configure ranges of
359