Configuring Attack Detection Exemption; Applying An Attack Defense Policy To An Interface - HP FlexNetwork 10500 Series Security Configuration Manual

Step
4. Set the global trigger
threshold for HTTP flood
attack prevention.
5. (Optional.) Specify the
global ports to be protected
against HTTP flood attacks.
6. Specify global actions
against HTTP flood attacks.
7. Configure IP
address-specific HTTP
flood attack detection.

Configuring attack detection exemption

The attack defense policy uses the ACL to identify exempted packets. The policy does not check the
packets permitted by the ACL. You can configure the ACL to identify packets from trusted servers.
The exemption feature reduces the false alarm rate and improves packet processing efficiency. For
example, the attack defense policy identifies multicast packets with the same source addresses and
different destination addresses as scanning attack packets (for example, OSPF or PIM packets). You
can configure an ACL to exempt such packets from attack detection.
If an ACL is used for attack detection exemption, only the following match criteria in the ACL permit
rules take effect:
•
Source IP address.
•
Destination IP address.
•
Source port.
•
Destination port.
•
Protocol.
•
L3VPN instance.
•
fragment keyword for matching non-first fragments.
To configure attack detection exemption:
Step
1. Enter system view.
2. Enter attack defense policy
view.
3. Configure attack detection
exemption.

Applying an attack defense policy to an interface

An attack defense policy does not take effect unless you apply it to an interface.
Command
http-flood threshold
threshold-value
http-flood port port-list
http-flood action { drop |
logging } *
http-flood detect { ip
ipv4-address | ipv6
ipv6-address } [ vpn-instance
vpn-instance-name ] [ port
port-list ] [ threshold
threshold-value ] [ action { drop |
logging } * ]
Command
system-view
attack-defense policy
policy-name
exempt acl [ ipv6 ]
{ acl-number | name acl-name }
479
Remarks
The default setting is 1000.
By default, HTTP flood attack
prevention protects port 80.
By default, no global action is
specified for HTTP flood attacks.
By default, IP address-specific
HTTP flood attack detection is not
configured.
Remarks
N/A
N/A
By default, attack detection
exemption is not configured.