Windows event ID 4977 - IPsec received an invalid negotiation packet

Event ID: 

4977

Category: 

Logon/Logoff

Subcategory: 

IPsec Quick Mode

Supported on: 

Windows Vista, Windows Server 2008

During Quick Mode negotiation, IPsec received an invalid negotiation packet. If this problem persists, it could indicate a network issue or an attempt to modify or replay this negotiation.

Local Network Address: %1
Remote Network Address: %2
Keying Module Name: %3

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