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ERROR_IPSEC_IKE_PROCESS_ERR_KE
ERROR_IPSEC_IKE_PROCESS_ERR_KE means the Diffie-Hellman key-exchange payload could not be parsed or accepted. It often accompanies an incompatible group, malformed public value, or a mismatched proposal.
What to check for ERROR_IPSEC_IKE_PROCESS_ERR_KE
- Check the Diffie-Hellman group configured by each peer.
- Look for a related
ERROR_IPSEC_IKE_DH_FAILor invalid-group error. - Capture both directions of the exchange to determine which peer generated the bad payload.
Microsoft: Use Netsh to manage network traces
Microsoft: IPsec IKE system error codes
Microsoft: Get-NetIPsecMainModeSA
Where the result is returned
This result is Win32 system error 13833 (0x00003609) from winerror.h. AllStat describes it as “Error processing KE payload”. The code is useful only together with the API that failed, because multiple Windows components can reuse system-error values while imposing different retry and cleanup rules.
Diagnostic sequence
- Call GetLastError immediately after the failing API and save this result, the function name, all relevant flags, and the target path, handle, service, device, account, or policy object.
- Capture the component log that owns the ipsec / ike / process / err / ke operation and retain the original numeric value before a framework converts it to an HRESULT or exception.
- compare preconditions with the API documentation and reproduce with a minimal request before changing system-wide configuration.
Retry this result only after the resource or state named in “Error processing KE payload” has changed. For invalid parameters, unsupported formats, missing objects, policy restrictions, and access failures, correct the input or configuration instead of immediately repeating the same call.
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