Abstract: A network traversal module in a branch node enables the establishment of secure communication between networks. The module allows devices on otherwise disconnected networks to communicate collected data to a root node for storage and analysis. The network traversal module supports auto configuration, and includes both a client-side functionality of accessing open ports or services, and server-side functionality of providing open ports or services. Each branch node is responsible for collecting data from client devices on its network or sub-network, and transmitting that data to the higher nodes. Each branch node is also responsible for retransmitting data received from lower nodes to higher nodes. In one embodiment, the network traversal module includes components to allow it to support authentication and revocation of certificates. A root node generates certificates. Each branch node is assigned a certificate, and uses that certificate to access and authenticate itself to other branch nodes.