problem with jit.net.send/recv
So I am learning the network objects, first I tried to connect two computers (windows and mac) within local network using tcp (jitter) and udp (udpsend/receive) they all work well. And then I used my phone LTE as wifi hotspot for mac and setup my router to forward tcp/udp to PC at some ports, trying to access from external internet, the udp works very well but I can't get the tcp (jit.net.send/recv) to work, I set the ip address of jit.net.send (mac) to the PC's public address, and they are on the same port, the ip of jit.net.recv is ANY, but the connection is always 0, did I do anything wrong?