HP VPN Firewall Appliances Attack Protection Configuration Guide

Figure 46 Network diagram

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 as follows:

1. Enable source MAC-based ARP attack detection and specify the handling method.

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.

<Firewall> system-view

[Firewall] arp source-mac filter

# Set the threshold to 30.

[Firewall] arp source-mac threshold 30

# Set the lifetime for ARP attack entries to 60 seconds.

[Firewall] arp source-mac aging-time 60

# Exclude 0012-3f86-e94c from this detection.

[Firewall] arp source-mac exclude-mac 0012-3f86-e94c

Configuring ARP packet source MAC consistency

check

ARP packet source MAC consistency check can be configured only at the CLI.

IP network

Gateway

Firewall

Host A Host B Host C Host D

ARP attack protection

Server

0012-3f86-e94c