Since the last update of the Core Service, the security has changed.
From now, you have to specify the username/password when you access directly to PulseStation.
Before :
http://remoteip:4020/message?=1|HUB|zwave|...
Now :
http://remoteip:4020/username/password/message?=1|HUB|zwave|...
We advice you to create a new user with limited access if you want to use this functionality.