The anti-ddos hardware defend enable command enables the hardware-based defense function.
The undo anti-ddos hardware defend enable command disables the hardware-based defense function.
Only the USG6610E/6620E, USG6630E/6650E, USG6635E/6655E support this command.
By default, the hardware-based defense function is enabled.
After the hardware-based defense function is enabled, attack traffic check and first-packet discarding for SYN packets can be performed on the hardware chip. To make the first-packet discarding function for SYN packets take effect, you also need to run the anti-ddos np-rule first-packet-check enable command.