Manifold learning visualization of network traffic data

When traffic anomalies or intrusion attempts occur on the network, we expect that the distribution of network traffic will change. Monitoring the network for changes over time, across space (at various routers in the network), over source and destination ports, IP addresses, or AS numbers, is an important part of anomaly detection. We present a manifold learning (ML)-based tool for the visualization of large sets of data which emphasizes the unusually small or large correlations that exist within the data set. We apply the tool to display anomalous traffic recorded by NetFlow on the Abilene backbone network. Furthermore, we present an online Java-based GUI which allows interactive demonstration of the use of the visualization method.