Zyxel ZyWALL 1100 [324/829] Ip mac binding overview

Zyxel ZyWALL 110 [324/829] Ip mac binding overview
ZyWALL/USG Series User’s Guide
324
CHAPTER 16
IP/MAC Binding
16.1 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/USG uses DHCP to assign IP addresses and records the MAC address it
assigned to each IP address. The ZyWALL/USG 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/USG.
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 221 IP/MAC Binding Example
16.1.1 What You Can Do in this Chapter
•Use the Summary and Edit screens (Section 16.2 on page 325) to bind IP addresses to MAC
addresses.
•Use the Exempt List screen (Section 16.3 on page 327) to configure ranges of IP addresses to
which the ZyWALL/USG does not apply IP/MAC binding.
16.1.2 What You Need to Know
DHCP
IP/MAC address bindings are based on the ZyWALL/USG’s dynamic and static DHCP entries.
MAC: 12:34:56:78:90:AB
Tim
IP: 192.168.1.27
MAC: AB:CD:EF:12:34:56
Jim
IP: 192.168.1.27

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