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VPN daemon states
| NM_VPN_SERVICE_STATE_UNKNOWN | =  | The state of the VPN plugin is unknown. | |
| NM_VPN_SERVICE_STATE_INIT | =  | The VPN plugin is initialized. | |
| NM_VPN_SERVICE_STATE_SHUTDOWN | =  | Not used. | |
| NM_VPN_SERVICE_STATE_STARTING | =  | The plugin is attempting to connect to a VPN server. | |
| NM_VPN_SERVICE_STATE_STARTED | =  | The plugin has connected to a VPN server. | |
| NM_VPN_SERVICE_STATE_STOPPING | =  | The plugin is disconnecting from the VPN server. | |
| NM_VPN_SERVICE_STATE_STOPPED | =  | The plugin has disconnected from the VPN server. | 
VPN connection states
| NM_VPN_CONNECTION_STATE_UNKNOWN | =  | The state of the VPN connection is unknown. | |
| NM_VPN_CONNECTION_STATE_PREPARE | =  | The VPN connection is preparing to connect. | |
| NM_VPN_CONNECTION_STATE_NEED_AUTH | =  | The VPN connection needs authorization credentials. | |
| NM_VPN_CONNECTION_STATE_CONNECT | =  | The VPN connection is being established. | |
| NM_VPN_CONNECTION_STATE_IP_CONFIG_GET | =  | The VPN connection is getting an IP address. | |
| NM_VPN_CONNECTION_STATE_ACTIVATED | =  | The VPN connection is active. | |
| NM_VPN_CONNECTION_STATE_FAILED | =  | The VPN connection failed. | |
| NM_VPN_CONNECTION_STATE_DISCONNECTED | =  | The VPN connection is disconnected. | 
VPN connection state reasons
| NM_VPN_CONNECTION_STATE_REASON_UNKNOWN | =  | The reason for the VPN connection state change is unknown. | |
| NM_VPN_CONNECTION_STATE_REASON_NONE | =  | No reason was given for the VPN connection state change. | |
| NM_VPN_CONNECTION_STATE_REASON_USER_DISCONNECTED | =  | The VPN connection changed state because the user disconnected it. | |
| NM_VPN_CONNECTION_STATE_REASON_DEVICE_DISCONNECTED | =  | The VPN connection changed state because the device it was using was disconnected. | |
| NM_VPN_CONNECTION_STATE_REASON_SERVICE_STOPPED | =  | The service providing the VPN connection was stopped. | |
| NM_VPN_CONNECTION_STATE_REASON_IP_CONFIG_INVALID | =  | The IP config of the VPN connection was invalid. | |
| NM_VPN_CONNECTION_STATE_REASON_CONNECT_TIMEOUT | =  | The connection attempt to the VPN service timed out. | |
| NM_VPN_CONNECTION_STATE_REASON_SERVICE_START_TIMEOUT | =  | A timeout occurred while starting the service providing the VPN connection. | |
| NM_VPN_CONNECTION_STATE_REASON_SERVICE_START_FAILED | =  | Starting the service starting the service providing the VPN connection failed. | |
| NM_VPN_CONNECTION_STATE_REASON_NO_SECRETS | =  | Necessary secrets for the VPN connection were not provided. | |
| NM_VPN_CONNECTION_STATE_REASON_LOGIN_FAILED | =  | Authentication to the VPN server failed. | |
| NM_VPN_CONNECTION_STATE_REASON_CONNECTION_REMOVED | =  | The connection was deleted from settings. |