Configuration Example - HP FlexFabric 5930 Series Security Configuration Manual

Configuration example

Network requirements
As shown in
a large number of ARP requests to the gateway, the gateway might crash and cannot process requests
from the clients. To solve this problem, configure source MAC-based ARP attack detection on the
gateway.
Figure 47 Network diagram
ARP attack protection
Host A
Configuration considerations
An attacker might forge a large number of ARP packets by using the MAC address of a valid host as the
source MAC address. To prevent such attacks, configure the gateway in the following steps:
1. Enable source MAC-based ARP attack detection and specify the handling method as filter.
2. Set the threshold.
3. Set the lifetime for ARP attack entries.
4. Exclude the MAC address of the server from this detection.
Configuration procedure
# Enable source MAC-based ARP attack detection, and specify the handling method as filter.
<Device> system-view
[Device] arp source-mac filter
# Set the threshold to 30.
[Device] arp source-mac threshold 30
# Set the lifetime for ARP attack entries to 60 seconds.
[Device] arp source-mac aging-time 60
# Exclude MAC address 0012-3f86-e94c from this detection.
Figure 47, the hosts access the Internet through a gateway (Device). If malicious users send
IP network
Host B
Gateway
Device
Host C
158
Server
0012-3f 86-e 94c
Host D