IQFeed Troubleshooting - Windows Defender

Author: Optuma Team Last updated: Aug 17, 2020 13:48


If the connection to IQFeed via Optuma is slow, unstable or delayed, it is possible the issue is being caused by Windows Defender.


You can setup Windows Defender to allow Optuma and IQFeed connections through the firewall without hindrance.


  1. Close Optuma and IQFeed
  2. Click on the Windows Start button and search for Windows Defender, open the option that is found.
  3. In the window that is displayed left click the Advanced Settings option.


  4. In the window that displays, click the Inbound Rules folder, the click New Rule…


  5. In the window that displays, select Program and click Next.


  6. Click the Browse button and navigate to the Optuma program folder. By default this will be:

    C:\Program Files\Optuma\Optuma.exe

    Click Next


  7. Click Allow the Connection then click Next


  8. Make sure all 3 options are ticked (Domain, Private, Public), and click Next


  9. Type in a name (Optuma for example) and click Finish.


  10. Repeat Steps 4 - 9 for the following folder path:

    C:\Program Files (x86)\DTN\IQFeed\iqconnect.exe

  11. Click on the Outbound Rules folder, then click New Rule.

  12. Repeat Steps 4 - 9 for the following folder paths:

    C:\Program Files\Optuma\Optuma.exe
    C:\Program Files (x86)\DTN\IQFeed\iqconnect.exe

Once this has been done, close the Windows Defender window, and restart the PC / Laptop to complete the process.