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I have a Windows 10 PC connected via LAN to a DLAN (aka powerline) adapter. The same DLAN adapter also is a Wifi Hotspot where Androids connect to.
The opposing DLAN adapter is connected via LAN to a DSL router.
PC and Android are on the same Subnet.
No matter what I try I'm unable to connect several, completely different, Android Remote Apps to the Windows 10 PC. Each app communicates via a fixed UDP port.
I tried to
- turn off Windows Firewall
- open UDP Ports in the Router (makes not much sense cause this is for internet connections, but anyway)
- allow Multicast etc.
- allow UPNP
- allow each client to open UDP ports
I have no idea why it's not working. I also have e.g. a Linux-VSFTP Server on the same DLAN adapter (via LAN) and there're no connection issues with any client.
How can I debug this?
Lee.D
Posted 2017-07-23T08:03:34.713
Reputation: 49
Are you saying the Android device can connect to the SFTP server? – Paul – 2017-07-23T08:22:42.877
Yes, all my Androids can connect to the local FTP server without any problems. It all started with Windows 10, first I had to replace SMB with FTP cause I was unable to make a SMB connection, tried for weeks. (Same topic, different story) Now this UDP problem. I'm going mad, I'm not that bad with networking but I cannot get this to work. – Lee.D – 2017-07-23T08:56:54.530
The SMB problem may have been a version thing, an older protocol. But if I were you I'd be breaking out wireshark to see what exactly is going on with UDP. – Paul – 2017-07-23T09:39:07.587
Wireshark shows the UDP port in question is on the wrong subnet. That subnet doesn't exist in my network. Why? How? How to fix? – Lee.D – 2017-07-23T10:51:04.063
It was VBox Network adapter.. :| – Lee.D – 2017-07-23T11:10:10.547