I am not able to block file sharing. Even when I have disabled file transfer proxy setting in Server Settings but still user are able to transfer files among them. How do you block file transfer between users.
What client do you use? Many clients support direct file transfers, and you can’t block it on the server. Then your only option is to use firewalls or disable that option in client. With Spark you can install Client Control plugin and i think it has an option to disable file transfers.