Systems, methods, and related technologies for clustering are described. The method includes determining one or more access policies associated with each of one or more clusters of entities, wherein a cluster comprises one or more entities with similar behavior. The method further includes determining one or more anomalies based on the one or more clusters, wherein the one or more access policies control communications between entities of the one or more clusters based on the one or more anomalies. The method further includes storing data associated with at least one of the one or more clusters and the one or more anomalies.