We built our house a few years ago. Before all the drywall went up I wired tons of networking into each room, including for for the Legrand Home Automation system and whole house audio. The core home automation module, the HA7000, is the integration work engine of the system. It connects to Legrand’s cloud servers for remote alerting, updating, etc. On February 20th, 2018 they had a significant service outage and their restoration procedure is not so seamless. Rather than following their instructions of changing my home router’s DNS forwarder I broke out tcpdump and did some digging. So if you have a Legrand system, need to do this update, and don’t want to pass your DNS traffic to them, read on.