We are looking for something that can provide a view (GUI or CLI) of all network traffic on our network. We are running all Apple computers, with SonicWall routers. Essentially, we'd like to have the ability to see what someone is looking at on the Internet when we notice that they are exceeding a regular traffic quota.
I know we could use wireshark; but, I'm not sure if we can run that on the entire network and still be able to sift through all of the data that it would return, in a reasonable amount of time.