Ip/Mac Binding; Chapter 13 Ip/Mac Binding; Overview; What You Can Do In This Chapter - ZyXEL Communications NXC2500 User Manual

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
Bob
Jim

13.1.1 What You Can Do in this Chapter

• The Summary and Edit screens
addresses.
• The Exempt List screen
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.
C
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 13.2 on page
(Section 13.3 on page
NXC Series User's Guide
160
HAPTER

IP/MAC Binding

161) bind IP addresses to MAC
163) configures ranges of IP addresses to which
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