In one embodiment, a networking device in a local area network (LAN) establishes a virtual network overlay in the LAN to redirect traffic associated with a particular node in the LAN to a server for analysis. The networking device receives an indication from the server that at least a portion of the traffic associated with the particular node is trusted for local sending within the LAN and adjusts the virtual network overlay to locally send the trusted portion of the traffic associated with the particular node to one or more other nodes in the LAN without redirection to the server. The networking device collects characteristic information regarding the trusted portion of the traffic sent locally within the LAN via the adjusted virtual network overlay and sends the collected characteristic information to the server for analysis.