| Index: media/tools/constrained_network_server/cns.py | 
| diff --git a/media/tools/constrained_network_server/cns.py b/media/tools/constrained_network_server/cns.py | 
| index 8bbc16a1ab47671ffa913465382810bbdd8e801c..734bd675101ae7607cf16b4ff17851e23555512d 100755 | 
| --- a/media/tools/constrained_network_server/cns.py | 
| +++ b/media/tools/constrained_network_server/cns.py | 
| @@ -327,6 +327,12 @@ def Main(): | 
| """Configure and start the ConstrainedNetworkServer.""" | 
| options = ParseArgs() | 
|  | 
| +  try: | 
| +    traffic_control.CheckRequirements() | 
| +  except traffic_control.TrafficControlError as e: | 
| +    cherrypy.log(e.msg) | 
| +    return | 
| + | 
| cherrypy.config.update( | 
| {'server.socket_host': '::', 'server.socket_port': options.port}) | 
|  | 
|  |