In the user access logs when the NC session is closed using the NC icon or the user has signed out, a corresponding log message is recorded containing the word "CHUNK". What are "chunks"?
Example:
2011-06-08 13:34:39 - nodeb - [10.209.192.222] Root::user1(Realm)[role] :Closed connection to TUN-VPN port 443 after 147 seconds, with 2783354 bytes read (in 3494 chunks) and 1126549 bytes written (in 2764 chunks)
Network Connect: Session ended for user with IP 10.27.73.1