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| ERROR_IPSEC_IKE_PROCESS_ERR_ID | ERROR_IPSEC_IKE_PROCESS_ERR_CERT_REQ |
ERROR_IPSEC_IKE_PROCESS_ERR_CERT
ERROR_IPSEC_IKE_PROCESS_ERR_CERT means the certificate payload in the IKE exchange was malformed, unsupported, or could not be processed in the current authentication context.
Packet capture is especially useful because this result concerns the received certificate payload itself. Establish what bytes and certificate type the peer sent before changing local trust, enrollment, or firewall configuration.
What to check
- Inspect the peer certificate type, chain and private-key-backed authentication configuration.
- Check whether the peer sends an unsupported certificate format or an incomplete chain.
- Correlate with certificate trust, revocation, key-usage and signature errors in the same attempt.
Microsoft: IKE/AuthIP authentication methods
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