ERROR_IPSEC_TRANSPORT_FILTER_NOT_FOUND - 13009 (0x32D1)
The specified transport mode filter does not exist.
Updated: Feb 21, 2026
Technical Meaning
This error code indicates that a specified transport mode filter for Internet Protocol Security (IPsec) does not exist in the system. IPsec is used to secure communications over networks by providing authentication and encryption services.
Error Details
The error ERROR_IPSEC_TRANSPORT_FILTER_NOT_FOUND is returned when an attempt is made to use or configure a transport mode filter that has not been defined or installed on the system. Transport mode filters are components of IPsec policies that define how data should be secured during transmission over a network.
Usage Context
This error typically occurs in scenarios where IPsec policies are being configured, applied, or queried by applications or administrative tools. It can also appear when troubleshooting issues related to IPsec policy enforcement on Windows systems.
Developer Interpretation
Developers should interpret this error as an indication that the specified transport mode filter is not available for use. This could be due to several reasons such as missing configuration, incorrect naming, or misconfiguration of the IPsec policies. Developers are advised to ensure that all required filters are correctly installed and configured before attempting to apply them.
Related Errors
ERROR_IPSEC_INVALID_POLICY(13002)ERROR_IPSEC_NO_DEFAULT_POLICY(13004)ERROR_IPSEC_KEYING_MODULE_NOT_FOUND(13015)
FAQ
Q: What does the error code 13009 mean?
A: The specified transport mode filter for IPsec does not exist.
Q: How can I resolve this issue?
A: Ensure that all required filters are correctly installed and configured. Verify the names and types of the filters to match those expected by your application or policy configuration.
Summary
The error ERROR_IPSEC_TRANSPORT_FILTER_NOT_FOUND is a specific error indicating that a transport mode filter for IPsec does not exist on the system. Developers should ensure proper installation and configuration of all required filters to avoid this issue.