Is there a table of supported hardware, that contains info about the USB-connection (or ethernet) on these devices. Like, which have data-lines connected, can the device electrically do host and device mode? Can I use a POE2USBC adapter, that presents itself as a USB-network device to the camera?
Ability to filter on those columns would be great.
Is thingino using the Ingenic linux kernel 3.ancient SDK version, or do they have/use something newer?
Was the network port bridged to both PCs all the time (as the description makes it sound, or did only the "active" PC get a functioning network connection?
Could you tell from the FDB of the upstream device, if there were more than two MAC addresses active on the port?
Did you (hopefully) open it up and make PCB pictures before chucking it?
This picture from the list of product pictures [0] indicates that the thing acts as an Ethernet bridge. It probably exposes itself as a USB-C gigabit Ethernet device to the machine it's plugged into.
Page four of TFM [1] supports this theory.
Also, this functionality is called out in the product listing and in the manual. I'm over here laughing my ass off because OP got so frightened by this clearly-documented feature that they immediately threw the thing in the trash, rather than first investigating to see if the source of the network traffic was the machines plugged into the device.
I'm not an expert on this, but know enough to know the KVM doesn't need its own IP. In fact, the KVM I replaced it with provides ethernet to both my machines (at the same time) without getting its own IP.
The manual, as OP said, does not offer any explanation, why the device might show up with an additional MAC/IP at the upstream switch port, and which services it might offer. OP sounds knowledgeable enough to be able to exclude the possibility, that the additional MAC/IP could be from one of the PCs, like e.g. when playing with VMs using an internal bridge in the Hypervisor.
Maybe the device has a bigger "cousin" device, that includes "control via APP", and this feature was not properly/fully disabled on this one.
The network was active for both machines connected to it. And it had its own IP. So 3 MAC addresses in total. I didn't ever open it up. But maybe someone will be interested in buying one and exploring more.
Many a soundcard supports changing jack "direction". Here's a StackExchange answer from 2012, on how to do it with the GUI tool `hdajackretask` : https://askubuntu.com/a/911961
Why did you not just login to the device, and switched off "Broadcast to multicast", or changed the destination address?
Edit: Some brands of Network-KVM use this, so that you can control the target device from another device, like e.g. an App on a tablet. That way you don't have to stand next to the target device in the noisy and cold machine room
The KVM didn't have any documentation on anything related to its network interface. I ran a port scan on it but didn't know if there was a way to log into it.
Yes, it uses RemoteApps. You can set it up yourself using just a vanilla Windows VM + FreeRDP3, no need for this app and all the complexities (and bugs) they come with it.
The ING in Thingino stands for Ingenic. The Ingenic chips are MIPS, all the other cams are ARM. Focusing on these chips allows us to produce a firmware that actually works (not my experience with openipc) and is already configured for a specific product so you don't have to spend hours figuring out specifics for your camera to enable the hardware features!
POE hasn't really made it to the commodity level you'll find on Amazon. There are some Vanhua models available on Aliexpress.. we also have some users successfully using various POE to USB adapters. I don't use one myself so i can't personally vouch for one... note that not all cams have data available on their USB ports, if you have questions about a specific choice, come visit us on Discord!
