UDP only working one way
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Hello,
My Windows PC, Ubuntu VM, and Raspberry Pi are all on a LAN, and I have built the Qt UDP client and server examples on all three. It works when the VM or Pi are sending, but not when my Windows PC is sending. I havent changed any code, the ports are all the same as the default example's. Does anyone know why this might happen? Thank you.
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Firewall on your Windows PC?
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I dont think that is it. I have tried disabling it all together and I get the same results. On top of that, even when it is ok, the outbound connection setting is set to Allowed (default).
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Just to clarify:
On what platform is the server running?
Are all incomming connections allowed on each device? -
Server is Windows, Virtual machine is Ubuntu, Raspberry Pi is running Raspbian.
Only the Windows machine has a firewall, and communication doesnt work even when it is off.Pi->Windows : OK
Pi->Ubuntu: OK
Pi->Pi local: OK
Ubuntu->Windows: OK
Ubuntu->Pi: OK
Ubuntu->Ubuntu local: OK
Windows->Windows local: OK
Windows->Ubuntu: Not OK
Windows->Pi: Not OK -
Solved:
I was using QHostAddress::Broadcast which is 255.255.255.255
I needed to have the local IP subnet 192.168.137 and then .255 for multicast.I am assuming that it is not a windows thing, it is just an feature of being the LAN host?
