Change in behavior of Bluetooth blocking rules after upgrade to Windows 10 version 1809 and later

Technical Articles ID: KB93519
Last Modified: 2022-09-06 15:59:49 Etc/GMT

Environment

Data Loss Prevention (DLP) Endpoint 11.x

Microsoft Windows 10 version 1809 and later

Problem

DLP protection rules that block file transfers also block other Bluetooth devices, such as headsets.

Cause

Microsoft has changed the RFComm network adapter device. The RFComm was changed from a network adaptor device to a Bluetooth device.

In Windows 10 versions 1507–1803, it was necessary to block the Bluetooth network adaptors to block files from being copied over Bluetooth.

In Windows 10 version 1809 and later, you must also block the RFComm device to block file transfers. See KB91976 - How to block file transfers via Bluetooth.

Solution

DLP is working as intended. The DLP policy was set to block the RFComm adaptor and it is blocked. The unintended behavior is some Bluetooth devices that use the RFComm are also blocked.

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Workaround

An Application File Access Rule for fsquirt.exe prevents it from accessing sensitive files. It also prevents the files from being copied over Bluetooth.

Affected Products

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Knowledge Center

Change in behavior of Bluetooth blocking rules after upgrade to Windows 10 version 1809 and later

Environment

Problem

Cause

Solution

Workaround

Affected Products

Languages:

Title

Title

Knowledge Center

Change in behavior of Bluetooth blocking rules after upgrade to Windows 10 version 1809 and later

Environment

Problem

Cause

Solution

Workaround

Affected Products

Languages:

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