The first packet discarding technology of Huawei Anti-DDoS devices can defend against attack packets that...

UDP protocol does not have a retransmission mechanism, so the first packet drop technique cannot be used.

The first packet is discarded in combination with source authentication to prevent false source attacks.

matches the packet based on the triplet (source IP address, source port, protocol), and judges the first packet by the interval of the packet.

The packet sending interval is lower than the first packet detection rate lower limit, or the packet higher than the first packet detection rate upper limit is considered to be the first packet.