Syn-Ack-Flood Detect Non-Specific - HP FlexNetwork 7500 Series Command Reference Manual

Usage guidelines
With SYN-ACK flood attack detection configured for an IP address, the device is in attack detection
state. When the sending rate of SYN-ACK packets to the IP address reaches the threshold, the
device enters prevention state and takes the specified actions. When the rate is below the silence
threshold (three-fourths of the threshold), the device returns to the attack detection state.
You can configure SYN-ACK flood attack detection for multiple IP addresses in one attack defense
policy.
Examples
# Configure SYN-ACK flood attack detection for 192.168.1.2 in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood detect ip 192.168.1.2
threshold 2000
Related commands
syn-ack-flood action

syn-ack-flood detect non-specific

syn-ack-flood threshold
syn-ack-flood detect non-specific
Use syn-ack-flood detect non-specific to enable global SYN-ACK flood attack detection.
Use undo syn-ack-flood detect non-specific to disable global SYN-ACK flood attack detection.
Syntax
syn-ack-flood detect non-specific
undo syn-ack-flood detect non-specific
Default
Global SYN-ACK flood attack detection is disabled.
Views
Attack defense policy view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
The global SYN-ACK flood attack detection applies to all IP addresses except for those specified by
the syn-ack-flood detect command. The global detection uses the global trigger threshold set by
the syn-ack-flood threshold command and global actions specified by the syn-ack-flood action
command.
Examples
# Enable global SYN-ACK flood attack detection in attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] syn-ack-flood detect non-specific
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