UAG4100 User’s Guide
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H A P T E R
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IP/MAC Binding
21.1 IP/MAC Binding Overview
IP address to MAC address binding helps ensure that only the intended devices get to use privileged
IP addresses. The UAG uses DHCP to assign IP addresses and records to MAC address it assigned
each IP address. The UAG 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 UAG.
Suppose you configure access privileges for IP address 172.16.1.27 and use static DHCP to assign
it to Bob’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 172.16.1.27 with another MAC address.
Figure 134
IP/MAC Binding Example
21.1.1 What You Can Do in this Chapter
• Use the
Summary
and
Edit
) to bind IP addresses to MAC
addresses.
• Use the
Exempt List
screen (
) to configure ranges of IP addresses to
which the UAG does not apply IP/MAC binding.
21.1.2 What You Need to Know
DHCP
IP/MAC address bindings are based on the UAG’s dynamic and static DHCP entries.
MAC: 12:34:56:78:90:AB
Bob
IP: 172.16.1.27
MAC: AB:CD:EF:12:34:56
Jim
IP: 172.16.1.27
