FMSGuru

Is it possible to restrain the instance names to some list e.g. (room1, room2, room3)?
The reason i'm asking this is, cause i wonder:
How does FMS protects against malicious users, that can create script to connect on 1000000 instances on the server?

Yes. You can grab the instance name when the app starts up and compare it to a list of room names that are allowed. If it isn't in that list then close the application down.

just to share how i did it. This goes at the top of application.onAppStart function:

//disconnect the application instance if not in the allowed room list
this.roomName = application.name.replace(/.*?\//, "");
var allowedRooms = new Array('English','French','Dutch','General','_definst_');
var disconnectflag = true;
var l = allowedRooms.length;
while(l--)
{
if(allowedRooms[l] == this.roomName){
disconnectflag = false;
break;
}
}
if(disconnectflag) application.shutdown();

Thanks for posting back with the code you wrote. Looks great! I'm sure it will be of good use to others.