Methods include receiving a threshold time to live (“TTL”) value associated with a license. The methods include determining a first TTL value based on the threshold TTL value. The methods include transmitting a polling request including the first TTL value from a polling device disposed at the network location to a network device. The first TTL value decreases each time the polling request transits through a node device. The methods include receiving a polling response from the network device if the first TTL value has not decreased to a predetermined value before the polling request is received by the network device. The methods include determining that the license permits communication between a monitoring device disposed at the network location and the network device in response to receiving the polling response.