Unable to handle more request

[rabi07]

sir ,Im using CS2 , only port udp 25017 open

with below config Threads=100 StatsPPS=true StatsbPS=true GameUpdateInterval=1000 GameUpdateSocketTimeout=1000 ChallengeCodeTTL=5000 LocalServerIPAddress=0.0.0.0 LocalServerPort=9110 GameServerIPAddress=127.0.0.1 GameServerPort=27015 ReceiveBufferSize=65535 SendBufferSize=65535 UdpGro=true A2sRule=true

The error shown below appears when a DDoS attack occurs.

------------ Dropping query request because Cache is not ready ----------- A2S_INFO: PooledUnsafeDirectByteBuf(ridx: 0, widx: 144, cap: 256) A2S_PLAYER: PooledUnsafeDirectByteBuf(ridx: 0, widx: 0, cap: 256)

im getting p/s more then 30k and b/s around 50k any way to fix it? Thanks you