[CA7301] Deprecation of GCM communication protocol and its effect on ESET’s Mobile Device Management


 ESET Customer Advisory 2019-0007

May 21, 2019

Severity: Medium


Google Cloud Messaging (GCM) communication protocol is being deprecated on May 29, 2019 and is being replaced by Firebase Cloud Messaging (FCM) communication protocol. After this date, there may be some required actions in order to allow full communication between Mobile Device Management (MDM) and ESET Endpoint Security for Android on managed devices.

Customer Advisory


On May 29, 2019, Google will deprecate the Google Cloud Messaging (GCM) communication protocol. This protocol is used by the ESET Remote Administrator / ESET Security Management Center MDM component for Android device management. The replacement protocol, Firebase Cloud Messaging (FCM), is supported by MDM versions 7.0 and later on the server side and by ESET Endpoint Security for Android versions 2.2.x and later on the client side.

Users of ESET MDM 6 who do not upgrade will see "GCM service connection problems" displayed in ESET Remote Administrator after May 29, 2019. However, the connection between the device and the server will not be lost altogether. Instead, the device will only connect using the default connection interval (once every 30 minutes), instead of the instant, action-triggered connections. Therefore, in order to ensure full functionality of the MDM-client connections, it is necessary to upgrade ESET MDM to version 7 and ESET Endpoint Security for Android to version 2.2.x or later (see the Resources section below for further instructions).

ESET MDM 7 already supports the FCM protocol. However, you need to allow communication with the Firebase Cloud Messaging hostname (fcm.googleapis.com) in your firewall, as well as verify that your managed Android devices run ESET Endpoint Security for Android version 2.2.x and later.

iOS device management is not affected by this change. However, ESET MDM version 6 support status will change to Basic Support soon. We highly recommend that you still upgrade to MDM version 7.

Affected products

  • ESET Mobile Device Management 6.x
    • Upgrade to version 7 necessary
  • ESET Mobile Device Management 7.x
    • Minor configuration checks necessary


Feedback & Support

If you have feedback or questions about this issue, please contact us using the ESET Security Forum, or via local ESET Support.

Version log

Version 1.0 (May 21, 2019): Initial version of this document