ERROR_IPSEC_REPLAY_CHECK_FAILED - 13913 (0x3659)
Packet sequence number replay check failed.
Updated: Feb 21, 2026
Technical Meaning
This error indicates that a packet sequence number replay check failed during the processing of an IPsec-secured packet. The sequence number is used to ensure that packets are not replayed, which could lead to security vulnerabilities.
Error Details
The ERROR_IPSEC_REPLAY_CHECK_FAILED error code signifies that the system detected a potential replay attack by verifying the sequence numbers in incoming IPsec packets. Sequence numbers are part of the cryptographic protocol and are used to prevent packet reordering or replay attacks, ensuring data integrity and security.
Usage Context
This error is typically encountered when processing IPsec-secured traffic on a Windows system. It can occur during the establishment or maintenance of an IPsec Security Association (SA) between two endpoints.
Developer Interpretation
When this error occurs, it indicates that the sequence number validation mechanism detected a packet with a previously seen sequence number. This could be due to various reasons such as incorrect sequence number generation, packet tampering, or a replay attack attempt. Developers should handle this error by ensuring proper sequence number management and validating packets against known good sequence numbers.
Related Errors
- ERROR_IPSEC_KEY_EXCHANGE_FAILED (0x80371002)
- ERROR_IPSEC_SA_REPLAYED (0x80371004)
- ERROR_IPSEC_INVALID_PACKET (0x80371005)
FAQ
Q: What does the ERROR_IPSEC_REPLAY_CHECK_FAILED error mean?
A: It indicates that a packet sequence number replay check failed, suggesting potential security issues.
Q: How can I prevent this error from occurring?
A: Ensure proper management of IPsec sequence numbers and validate packets against known good sequence numbers to avoid replay attacks.
Summary
The ERROR_IPSEC_REPLAY_CHECK_FAILED error is a specific technical issue related to the validation of packet sequence numbers in IPsec-secured traffic. It highlights potential security vulnerabilities and should be handled by ensuring proper sequence number management and validating packets against known good sequence numbers.