See every server your devices secretly phone home to, live on a map
Your TV, thermostat and doorbell talk to the internet all day, and almost none of it is you. LAN Sheriff is a self-hosted, open-source monitor that maps those connections live and flags the one packet that doesn't belong. Zero-config install; it auto-uses its "Patrol" mode over libpcap to watch every device on your network, not just this machine. If your Dad's router is acting up, that's the security payoff: catching beaconing before it becomes a breach.