This security policy setting determines whether the operating system generates events for the results of the Internet Key Exchange (IKE) protocol and Authenticated Internet Protocol (AuthIP) during Main Mode negotiations.

Event volume: High

If this policy setting is configured, the following events are generated. The events appear on computers running Windows Server 2008 R2, Windows Server 2008, Windows 7, or Windows Vista.

• 4646: Security ID: %1
• 4650: An IPsec Main Mode security association was established. Extended Mode was not enabled. Certificate authentication was not used.
• 4651: An IPsec Main Mode security association was established. Extended Mode was not enabled. A certificate was used for authentication.
• 4652: An IPsec Main Mode negotiation failed. (Note: This audit event returns detailed audit data in the following categories: Local Endpoint, Local Certificate, Remote Endpoint, Remote Certificate, Additional Information, and Failure Information.)
• 4653: An IPsec Main Mode negotiation failed. (Note: This audit event returns detailed audit data in the following categories: Local Endpoint, Remote Endpoint, Additional Information, and Failure Information.)
• 4655: An IPsec Main Mode security association ended.
• 4976: 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.
• 5049: An IPsec Security Association was deleted.
• 5453: An IPsec negotiation with a remote computer failed because the IKE and AuthIP IPsec Keying Modules (IKEEXT) service is not started.