DNS_ERROR_INVALID_KEY_SIZE 0x80072392

Error code 9106 · HRESULT 0x80072392

WINDOWS

The specified key size is not supported.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

DNS_ERROR_INVALID_KEY_SIZE is a Windows error code (system error 9106, returned as HRESULT 0x80072392) reported by Windows. Its official message is: “The specified key size is not supported.”

How to fix DNS_ERROR_INVALID_KEY_SIZE

  1. Test connectivity to the remote host first (ping, then the exact port)
  2. Check firewall, VPN and proxy rules for the involved process
  3. Run 'ipconfig /flushdns' and 'netsh interface ip reset', then reboot

Related errors

DNS_ERROR_INVALID_ROLLOVER_PERIODDNS_ERROR_INVALID_INITIAL_ROLLOVER_OFFSETDNS_ERROR_INVALID_SIGNATURE_VALIDITY_PERIODDNS_ERROR_INVALID_NSEC3_ITERATION_COUNTDNS_ERROR_UNSUPPORTED_ALGORITHMDNS_ERROR_SIGNING_KEY_NOT_ACCESSIBLEDNS_ERROR_NOT_ENOUGH_SIGNING_KEY_DESCRIPTORS

Source: Microsoft WinError.h

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