Lora gateway bridge not recieving data


#1

I am using an RAK831 gateway. Semtech packet forwarder is installed in it and it succesfully send data thingsnetwork. but it doesnt not send data to lora bridge or lora server.
this is my local configurations

            "server_address": "192.168.8.100",
            "serv_port_up": 1700,
            "serv_port_down": 1700,
            "serv_enabled": true,
            "ref_latitude": 0,
            "ref_longitude": 0,
            "ref_altitude": 0 

my gateway is in same network as lora bridge. lora bridge is installed on ubuntu seperately. ```
sudo tcpdump -AUq -i lo port 1700 in gateway and sudo tcpdump -AUq port 1700 lora bridge doesnt show any packets recieved. please help to find out what was wrong.