Knowledge

ERROR_IPSEC_TUNNEL_FILTER_NOT_FOUND - 13017 (0x32D9)

The specified tunnel mode filter was not found.

Updated: Feb 21, 2026

Technical Meaning

This error code indicates that a required tunnel mode filter could not be located during the execution of an IPsec-related operation. The absence of this filter may prevent the establishment or continuation of secure communication tunnels.

Error Details

The ERROR_IPSEC_TUNNEL_FILTER_NOT_FOUND is a specific error code used in Windows to denote a failure related to IPsec tunnel filters. This error typically occurs when the system attempts to configure, modify, or use an IPsec policy that includes a filter for tunnel mode but cannot find the specified filter.

Usage Context

This error can arise in various scenarios where IPsec policies are being managed or enforced. Common contexts include:

  • Configuring new IPsec policies
  • Modifying existing IPsec policies
  • Enforcing IPsec policies during network communication

Developer Interpretation

Developers should interpret this error as an indication that a necessary component for secure tunneling is missing. This could be due to several factors, such as the filter not being installed or configured correctly, or the policy referencing a non-existent filter.

Common Causes

  • The specified IPsec tunnel filter does not exist in the system.
  • The filter has been removed or disabled.
  • There is an error in the configuration of the IPsec policy that references the missing filter.

Related Errors

  • ERROR_IPSEC_KEYING_MODULE_NOT_FOUND (13024, 0x3318)
  • ERROR_IPSEC_POLICY_NOT_FOUND (13006, 0x32D2)
  • ERROR_IPSEC_MM_AUTH_FAILED (13057, 0x3491)

FAQ

Q: What does the error code mean?

A: The specified IPsec tunnel filter was not found.

Q: How can I resolve this issue?

A: Ensure that all necessary filters are installed and correctly configured in your IPsec policies. Verify the configuration of any related policies to ensure they reference valid filters.

Summary

The ERROR_IPSEC_TUNNEL_FILTER_NOT_FOUND error code is a specific indication that a required tunnel mode filter could not be located during an IPsec operation. Developers should address this by ensuring all necessary components are correctly installed and configured.