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Hierarchy Level


Specify the number of SYN segments that the device can receive per second from a single source IP address (regardless of the destination IP address and port number) before the device begins dropping connection requests from that source.


number —Number of SYN segments to be received per second before the device starts dropping connection requests.

  • Range: 4 through 500,000 per second

  • Default: 4000 per second


For SRX Series devices the applicable range is 4 through 1,000,000 per second.

Required Privilege Level

security—To view this statement in the configuration.

security-control—To add this statement to the configuration.

Release Information

Statement modified in Junos OS Release 9.2.