Replication filtering is a feature that prevents changes done on a game client from propagating to the server. It can be enabled by changing the value of the FilteringEnabled property of the . When the FilteringEnabled property is set to true, changes done to properties of the (the game object) and its descendants will only replicate if originating from the server, and otherwise will be ignored. This effectively prevents most exploiting, since players in a game can only modify how the game works and looks for themselves: their changes will not be replicated to the server and then to other players, and remain harmless.