Windows Security Log Event ID 4977

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019
Category
 • Subcategory
Logon/Logoff
 • IPsec Quick Mode
Type Success
Corresponding events
in Windows 2003
and before
 
Discussions on Event ID 4977
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4977: During Quick Mode negotiation, IPsec received an invalid negotiation packet.

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Examples of 4977

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:  10.40.1.123
Remote Network Address: 10.40.1.101
Keying Module Name:     IKEv1

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