Way to fix TCP LocalPort Source

i try to communicate with a 2 way radio motorola i have the protocol but there is problem :smiley:
It s a tcp protocol the device wait a communication on port 8002 > that s ok (wireshark see the in and the out) but the answer is always on the node-red source port who is dynamic so i can t receive it
Try with tcp-request but no way .
An idea ?