What does Windows error code 13863 (ERROR_IPSEC_IKE_INVALID_SITUATION) mean?

 
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ERROR_IPSEC_IKE_UNKNOWN_DOI ERROR_IPSEC_IKE_DH_FAILURE

ERROR_IPSEC_IKE_INVALID_SITUATION

ERROR_IPSEC_IKE_INVALID_SITUATION (0x00003627) During legacy IKEv1 processing, Windows received a situation field that does not match the supported IPsec interpretation. This normally indicates a peer implementation or policy-compatibility problem.

Because this field belongs to legacy IKEv1 semantics, verify the actual protocol version and peer implementation first. Modern policy changes elsewhere on the system are unlikely to explain a malformed or unsupported situation value by themselves.

What to check

  • Compare the IKE/IPsec policy exported by both endpoints, including protocol version and proposal types.
  • Check whether an older gateway or template is forcing obsolete IKEv1 settings.
  • Capture the negotiation to identify the exact payload that differs before changing broad firewall policy.
netsh trace start capture=yes scenario=InternetClient

Microsoft: Netsh network tracing

Microsoft: Audit IPsec Main Mode

Microsoft: IPsec/IKE system error codes

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