Configuring arp filtering, Introduction, Configuration procedure – H3C Technologies H3C WX3000E Series Wireless Switches User Manual
Page 356: Arp filtering configuration example, Network requirements
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Configuring ARP filtering
Introduction
The ARP filtering feature can prevent gateway spoofing and user spoofing attacks.
An interface enabled with this feature checks the sender IP and MAC addresses in a received ARP packet
against permitted entries. If a match is found, the packet is handled normally. If not, the packet is
discarded.
Configuration procedure
To configure ARP filtering:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet interface
view or WLAN-ESS interface
view.
interface interface-type interface-number N/A
3.
Configure an ARP filtering
entry.
arp filter binding ip-address
mac-address
Not configured by default
NOTE:
•
You can configure up to eight ARP filtering entries on a port.
•
Commands arp filter source and arp filter binding cannot be both configured on a port.
•
If ARP filtering works with ARP detection, MFF, ARP snooping and ARP fast-reply, ARP filtering applies
first.
ARP filtering configuration example
Network requirements
As shown in
, the IP and MAC addresses of Client 1 are 10.1.1.2 and 000f-e349-1233. The IP
and MAC addresses of Client 2 are 10.1.1.3 and 000f-e349-1234.
Configure ARP filtering on the AC's WLAN interface to permit specific ARP packets only.
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