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ERROR_IPSEC_IKE_KERBEROS_ERROR
ERROR_IPSEC_IKE_KERBEROS_ERROR means the IKE authentication method relied on Kerberos and the Kerberos exchange failed. The cause can be domain connectivity, DNS/SPN mapping, time skew, missing computer account trust, or an IPsec rule that selects Kerberos for a peer outside the expected domain trust.
What to check
- Verify domain-controller reachability, DNS resolution, time synchronization and computer-account health.
- Confirm both peers use a compatible Kerberos-based authentication method in the effective rule.
- Check the relevant Kerberos and IPsec Main Mode events at the same timestamp.
Microsoft: IKE/AuthIP authentication methods
Microsoft: Audit IPsec Main Mode
Microsoft: IPsec IKE system error codes
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