Blocked xx.xx.xx.xx for 300 seconds ，how to fix it?

Log 1:

2018-07-06 [04:03:06] [RakLibServer thread/DEBUG]: Received duplicate or out-of-window packet from 106.47.97.203 6601 (sequence number 106785, window 106906-108954)
2018-07-06 [04:04:26] [RakLibServer thread/NOTICE]: Blocked 106.47.97.203 for 300 seconds

Log 2:
Received garbage message from 172.17.0.1 54556 (Packet magic is invalid): 05000000
2018-07-05 [09:26:22] [RakLibServer thread/DEBUG]: #0 /vendor/pocketmine/raklib/src/server/SessionManager(139): raklib\server\SessionManager->receivePacket()
2018-07-05 [09:26:22] [RakLibServer thread/DEBUG]: #1 /vendor/pocketmine/raklib/src/server/SessionManager(131): raklib\server\SessionManager->tickProcessor()
2018-07-05 [09:26:22] [RakLibServer thread/DEBUG]: #2 /vendor/pocketmine/raklib/src/server/SessionManager(103): raklib\server\SessionManager->run()
2018-07-05 [09:26:22] [RakLibServer thread/DEBUG]: #3 /vendor/pocketmine/raklib/src/server/RakLibServer(237): raklib\server\SessionManager->__construct(raklib\server\RakLibServer object, raklib\server\UDPServerSocket object, integer 1492)
2018-07-05 [09:26:22] [RakLibServer thread/DEBUG]: #4 (): raklib\server\RakLibServer->run()
2018-07-05 [09:26:22] [RakLibServer thread/NOTICE]: Blocked 172.17.0.1 for 5 seconds

 

Maybe the internet speed of client is so slow

 

This problem only occurs on the newly purchased PC/Win10/MCPE. There is no such problem with MCPE on the mobile phone.

The same network environment.