Hi, at home there are 2 android phones and rest are macs (phones and computers). I tested my broadband connection on speedtest.net and sometimes it shows good numbers 16mbps d/l and sometimes 4-5 mbps. I suspect some device is flooding my internet wifi network and I want to find out which IP address it has. Is there some LAN sniffer program for my el capitan mac that can show packets flooding the home network and find out its IP address? This is a mess and I need to fix it. I have little snitch working on my own mac and it not showing any abnormal activity. Thanks!