DNS_ERROR_UNSUPPORTED_ALGORITHM 0x80072391

Error code 9105 · HRESULT 0x80072391

WINDOWS

The specified algorithm 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_UNSUPPORTED_ALGORITHM is a Windows error code (system error 9105, returned as HRESULT 0x80072391) reported by Windows. Its official message is: “The specified algorithm is not supported.”

How to fix DNS_ERROR_UNSUPPORTED_ALGORITHM

  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_KEY_SIZEDNS_ERROR_NOT_ENOUGH_SIGNING_KEY_DESCRIPTORSDNS_ERROR_NSEC3_INCOMPATIBLE_WITH_RSA_SHA1DNS_ERROR_SIGNING_KEY_NOT_ACCESSIBLEDNS_ERROR_NOT_ALLOWED_ON_SIGNED_ZONEDNS_ERROR_KSP_DOES_NOT_SUPPORT_PROTECTIONDNS_ERROR_KEYMASTER_REQUIRED

Source: Microsoft WinError.h

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