My understanding is that the Meraki device is listening for that DNS request. If you have a DNS server running like AD DNS on your network, you could create a forward lookup zone for my.meraki.com, or mx.meraki.com etc. and point to the clients to that DNS server which will fail to load anything. Thinking outside of the box, but have done this in the past as a quick way (without web filtering) to block entire domains. This obviously only works if you restrict the clients DNS to your DNS server. Otherwise they can just change it to something else and would work globally. ... View more