Logon Logoff Event: 4976

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Logon Logoff » Logon Logoff Event: 4976

Event ID 4976 – During Main Mode negotiation, IPsec received an invalid negotiation packet.

Event ID 4976
Category Logon/Logoff
Sub-Category Audit IPsec Main Mode
Description During a Main Mode negotiation, IPsec received an invalid negotiation packet.

If IPsec receives an invalid negotiation packet, event 4976 is generated. If there is a repetition of this problem, it could indicate either a network issue or an attempt to modify and replay the negotiation.

Example of 4976 log:

During Main 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

Why does event ID 4976 need to be monitored?

Security events which fall under the Audit IPsec Main Mode subcategory are monitored primarily for IPsec Main Mode troubleshooting.

Pro Tip:

With in-depth reports, real-time alerts, and graphical displays, ADAudit Plus tracks all IPsec negotiations, helping you meet your security, operational, and compliance needs with absolute ease.

Event 4976 applies to the following operating systems:

  • Windows 10
  • Windows Server 2016

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