In one embodiment, a method includes receiving client-server connection data for clients and servers, the data including IP addresses corresponding to the servers, for each one of a plurality of IP address pairs performing a statistical test to determine whether the IP addresses in the one IP address pair are related by common clients based on the number of the clients connecting to each of the IP addresses in the one IP address pair, generating a graph including a plurality of vertices and edges, each of the vertices corresponding to a different IP address, each edge corresponding to a different IP address pair determined to be related by common clients in the statistical test, and clustering the vertices yielding clusters, a subset of the IP addresses in one of the clusters providing an indication of the IP addresses of the servers serving a same application.