Windows Security Log Event ID 5146

Operating Systems Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019 and 2022
 • Subcategory
 • Other System Events
Type Failure
Corresponding events
in Windows 2003
and before

5146: The Windows Filtering Platform has blocked a packet

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This event is new to Server 2012. It does not appear in earlier versions.

I haven't been able to produce this event. Have you? If so, please start a discussion (see above) and post a sample along with any comments you may have! Don't forget to sanitize any private information.

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Examples of 5146

The Windows Filtering Platform has blocked a packet.

Network Information:
    Direction:           %1
    Source Address:      %2
    Destination Address: %3
    EtherType:           %4
    VlanTag:             %5
    vSwitchId:           %6
    Source vSwitch Port: %7
    Destination vSwitch Port:    %8

Filter Information:
    Filter Run-Time ID:  %9
    Layer Name:          %10
    Layer Run-Time ID:   %11

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