05-11-2017
Suggest any linux with wireshark....
At work we use older laptops with wireshark. Connect to a port, figure out what port to monitor and let it run. Then take the monster files created and sort through them using a variety of tools. My laptop still has an old version of opensuse on it, but it does have 500GB of disk.
Wireshark files can get really large, quickly, depending on what you are monitoring. Disk is important. So we use junk laptops, I'm sure you could use raspbian instead.
The only other component that has to be up to snuff is the NIC - the data center is on a 10 gigabit backbone. Most home network routers and DSL modems are 1Gb usually.
I am not sure what exact hardware you'd need to buy to support wireshark on raspbian.
Disk and NIC that will do what you need is up to you.
Oh. And the learning curve on wireshark is not bad, but reading output usually requires scripting ability. Or good vim/RE skills. vi has has file size limits.
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