Windows error 13866 (ERROR_IPSEC_IKE

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: IKE failed while encrypting a protocol payload.

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ERROR_IPSEC_IKE_INVALID_GROUP	ERROR_IPSEC_IKE_DECRYPT

ERROR_IPSEC_IKE_ENCRYPT

ERROR_IPSEC_IKE_ENCRYPT (0x0000362A) IKE could not encrypt a payload during negotiation. The root cause may be a crypto-provider failure, a proposal mismatch discovered late in processing, or local resource/service problems.

What to check

Check IKEEXT and cryptographic-service events for earlier errors on the local machine.
Verify that both peers support the negotiated encryption algorithm and that policy did not change during the exchange.
Capture the failing negotiation before modifying algorithm policy so that the selected proposal is known.

Get-Service IKEEXT

Microsoft: Netsh network tracing

Microsoft: Audit IPsec Main Mode

Microsoft: IPsec/IKE system error codes

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