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Best home ip scanner for sorting connected devices?
I help out with a local organization and so I have a budget of zero. I suspect something got infected, but I'm having trouble isolating it. I'd like to know what devices are connected to the LAN (wired and wifi), but I don't have any tools for scanning the LAN for connected devices. Is there an open source tool out there that will tell me device addresses (at least)?
At the moment, I can get a list of wifi devices that claim a DHCP address from off the router. I think I've got a complete list of wired devices (unplug them from the switch, see which ones complain, etc.). However, I suspect I'm missing something. It would be nice to see what a network scanner would come up with.
My nightmare scenario is Wireshark, but I'm getting to that point. If you know of something, can you help a nerd out?