One ftp server running Windows. No firewalls, the server is accesible (tested). Its ip is 192.168.1.148
One ftp client, an omap(arm) with qt 5.3.1.
Using the network/download example, if the server and the client are connected to switch (our corporate lan) running on the client 'download ftp://A:A@192.168.1.148:21/file' works correctly.
If the server and the client are connected directly, with an ethernet cable, the execution of the above example hangs indefinitely.
There's ping between both. Even a telnet to the server port 21 on the client gives a correct connection. tcpdump shows no trace of any attempt from the qt client to do anything (no packets).

I don't know if it is relevant but when we run the download example both when it goes well as when it goes wrong, the message "The name org.ofono was not provided by any .service files" is shown two times

More info: The QAccesNetworkManager reports that the network is not accessible.