On-Q

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. The instructions Legrand provided lead the home owner/installer to change the DNS forwarder setting on the router to 35.171.238.72. Clearly what they had done was change the DNS records on this server. This meant no changes were made by the end user to the panel directly. The panel would simply get the new IP addresses and start communicating with the new server. Therefore all I needed were the DNS records the panel was doing a lookup on. On the router I ran tcpdump to watch for the queries from the panel: ...