Zyxel NXC5500 [160/469] What you can do in this chapter

Zyxel NXC5500 [160/469] What you can do in this chapter
NXC Series User’s Guide
160
CHAPTER 13
IP/MAC Binding
13.1 Overview
IP address to MAC address binding helps ensure that only the intended devices get to use privileged
IP addresses. The NXC uses DHCP to assign IP addresses and records to MAC address it assigned
each IP address. The NXC 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 NXC.
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 83 IP/MAC Binding Example
13.1.1 What You Can Do in this Chapter
•The Summary and Edit screens (Section 13.2 on page 161) bind IP addresses to MAC
addresses.
•The Exempt List screen (Section 13.3 on page 163) configures ranges of IP addresses to which
the NXC does not apply IP/MAC binding.
13.1.2 What You Need to Know
The following terms and concepts may help as you read this chapter.
DHCP
IP/MAC address bindings are based on the NXC’s dynamic and static DHCP entries.
MAC: 12:34:56:78:90:AB
Bob
IP: 192.168.1.27
MAC: AB:CD:EF:12:34:56
Jim
IP: 192.168.1.27

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