extern NSString * const kVPNUNewSSIDNotificationKey;

Key for newly found SSID value, passed in userInfo dictionary of VPNUNewSSIDFoundNotification notification.

 extern NSString * const VPNUConnectionStatusDidChangeNotification;

Notification that is posted when the VPN connection status changes.

 extern NSString * const VPNUConnectionStatusDidChangeNotificationIsDefaultManagerKey;

Value for this key in `VPNUConnectionStatusDidChangeNotification` `userInfo` dictionary contains `NSNumber` representation of boolean flag which if `YES` indicates that message was sent from default NEVPNManager.

 extern NSString * const VPNUConnectionStatusDidChangeNotificationStatusKey;

Value for this key in `VPNUConnectionStatusDidChangeNotification` `userInfo` dictionary contains `NSNumber` representation of `VPNUConnectionStatus`.

 extern NSString * const VPNUDidSignOutNotification;

Notification that is posted when current user is signed out.

 extern NSString * const VPNUNewSSIDFoundNotification;

Notification that is posted when device connects to a new unrecognized WiFi network.