Event ID 5440

The following callout was present when the Windows Filtering Platform Base Filtering Engine started.

The following callout was present when the Windows Filtering Platform Base Filtering Engine started.

Provider Information:   
    ID:     %1
    Name:       %2

Callout Information:
    ID:     %3
    Name:       %4
    Type:       %5
    Run-Time ID:    %6

Layer Information:
    ID:     %7
    Name:       %8
    Run-Time ID:    %9


This event is generated exclusively during system initialization—once for each WFP callout previously registered and persistent within the Base Filtering Engine. It serves as an informational record of the WFP stack’s state at startup and does not signify a configuration change.

Auditing:     Rarely

Enable this event only if a comprehensive inventory of startup callouts is required for baseline comparisons or forensic analysis.


Volume:     Low

On a standard Windows workstation this is typically 10–30 events per reboot. On servers with third-party firewall or network inspection software (AV, EDR, VPN) the count may be higher but still bounded per boot cycle — not a continuous stream.




Name Field Insertion String OS Example
Provider ID ProviderKey %1 Any {DECC16CA-3F33-...}
Provider Name ProviderName %2 Any Microsoft Corporation
Callout ID CalloutKey %3 Any {C3DBED20-0BB6-...}
Callout Name CalloutName %4 Any Windows Firewall: callout
Callout Type CalloutType %5 Any %%388
Callout Run-Time ID CalloutId %6 Any 279
Layer ID LayerKey %7 Any {E1CD9FE7-F4B5-...}
Layer Name LayerName %8 Any ALE Receive/Accept
Layer Run-Time ID LayerId %9 Any 44


Lookup Audit Policy Configuration Settings

C:\> AuditPol.exe /get /subcategory:"Filtering Platform Policy Change"



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