R0106-HP MSR Router Series Security Command Reference(V7)

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Related commands
• syn-flood action
• syn-flood detect
• syn-flood threshold
syn-flood threshold
Use syn-flood threshold to set the global threshold for triggering SYN flood attack prevention.
Use undo syn-flood threshold to restore the default.
Syntax
syn-flood threshold threshold-value
undo syn-flood threshold
Default
The global threshold is 1000 for triggering SYN flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold for triggering SYN flood attack prevention. The value range is 1
to 1000000 in units of SYN packets sent to an IP address per second.
Usage guidelines
The global threshold applies to SYN flood attack detection for non-specific IP addresses.
Adjust the threshold according to the application scenarios. If the number of SYN packets to a protected
server, such as an HTTP or FTP server, is normally large, set a large threshold. A small threshold might
affect the server services. For a network that is unstable or susceptible to attacks, set a small threshold.
Examples
# Set the global threshold to 100 for triggering SYN flood attack prevention 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-flood threshold 100
Related commands
• syn-flood action
• syn-flood detect
• syn-flood detect non-specific
udp-flood action
Use udp-flood action to specify global actions against UDP flood attacks.
Use undo udp-flood action to restore the default.