I often find myself in the position of having to sniff on a connection between for example an arm board I am developing on, and another computer on the network, or out of the network.
The easy situation is when I can install a sniffer on the computer talking to the embedded device. When it is not possible, I currently install an old 10Mb/s HUB. However I am afraid my HUB might stop working, and I would like to know some alternative.
Here are the alternatives I could think of :
- Buy another HUB. Is that still possible ?
- Have some sort of ethernet sniffing bridge, like what they do for USB. I am afraid this kind of device is expensive.
- use ARP poisoning.