I am using my server in a quite extended network with many and changing users. The dedicated devices, such as my Sony Bravia, Samsung TV or Blu-Ray player are configured once and I do not need access control for them.
The problem is that I have many users in my subnet who can access the DNLA services by any computer or laptop running WIN7 for example. If I do not have any control who is allowed to access the server, I will provide "free movies" for everybody, and this is not my intension.
The Samsung PC share manager displays a list of active DNLA clients in the network, displaying their IP as well as MAC number. I then can choose to reject or accept them for future use of the server. I assume that the MAC number is stored for access control, as it is a unique identification and changing IP adresses won't matter.
Would be great to see this feature within MC!