sending and receiving udp packets ?

Hi,

I use stm32h7 nucleo board and I have been trying to do ethernet communication with udp for a long time.I can ping without to be packet losses.I have only problem is that I can send packet to pc from my board but when I returned to the board from pc ,the packets don't transmit.

I added my project files and wireshark output.

pc ip addres :192.168.0.11

board ip addres :192.168.0.10