要禁止或允许发布或订阅用户，可以在appStart回调方法中使用这些方法：
- registerStreamPlaybackSecurity
- registerStreamPublishSecurity
有关更多信息，请查看：
http://dl.fancypre.com/red5/api/org/red5/server/adapter/MultiThreadedApplicationAdapter.html
我正在使用jRuby，这样做很容易：
registerStreamPlaybackSecurity do |scope, name, start, len, flush| false # no playback allowedendregisterStreamPublishSecurity do |scope, name, mode| rand(1) % 1 == 0 # publishing (recording) sometimes allowed, sometimes noend
