Hard sniffer?

Question

Iron

Good day to all
Interested in a ready-made hardware network packet sniffer - an independent device with dimensions, for example, with RPI and the ability to transparently pass traffic through itself and capture it

in the picture lightning protection - this is how I see this device in my head,
are there ready-made industrial options or will I have to pervert myself with MiniPC and crocodiles?
Thanks

Answer 1

We can say that there is.
About three years ago, when I was picking microcontrollers with enc28j60, I discovered that this dirty trick intercepts absolutely all packets from the network. So we can say that there is: ardurino + ethernet shield to it.

Answer 2

Network Time Machine™ Integrated device for s...

Answer 3

Well s. Any Linux on a minicomputer with two ports, between ports - bridge, on the bridge - tcpdump. The question is where to write it only.

Answer 4

hackerwarehouse.com/product/alfa-ap121u-802-11n-ap... here is the ideal option... where to buy it in Russia or an analogue

Answer 5

The dumbest way is passive ethernet tap, but this is not suitable for the case of 1000BASE-T (the so-called "gigabit ethernet"). On the other hand, almost any device that works with gigabit Ethernet must also support 100-megabit. Here is an example device. Pluses - a kind of decoupling, network performance does not depend on whether you have time to process traffic or not. In addition, independence from food.
If (and I don't understand why) you still need to capture traffic from the gigabit interface, here is a possible option. There is a minus here - if the device suddenly starts to work abnormally (or stops working altogether), this will affect the working traffic on the network.