Windows 10: Ensure Unlisted File Extensions are not allowed

Discus and support Ensure Unlisted File Extensions are not allowed in Windows 10 Gaming to solve the problem; Hi Team,I need to fix OS IIS below VA. I had tried given steps, but it is not supporting by applications.4.7 Ensure Unlisted File Extensions are not... Discussion in 'Windows 10 Gaming' started by Shyam Ji Mishra1, Jun 17, 2025 at 12:17 AM.

  1. Ensure Unlisted File Extensions are not allowed


    Hi Team,I need to fix OS IIS below VA. I had tried given steps, but it is not supporting by applications.4.7 Ensure Unlisted File Extensions are not allowed - Default 4.7 Ensure Unlisted File Extensions are not allowed - Applications I had Tried below solutionsTried adding the setting with allowUnlisted="false" and observed that it didn't work as expected.As recommended to add a wildcard extension * to support routing properly and observed that it didn't work as expected.

    :)
     
    Shyam Ji Mishra1, Jun 17, 2025 at 12:17 AM
    #1

  2. "Unlisted File Extensions are not allowed" IIS 8.5 option is filtering all URL calls to WebSphere

    We are running IIS 8.5.9600.16384 with Windows 2012 R2, with IIS routing Java server application calls to WebSphere Application Server 8.5. In IIS, we have configured a web server instance, where it serves static files from the disk, at the same time the
    IIS-WAS connector ensures URLs that call the Java server are routed properly. This configuration is running correctly with no issues.

    As part of our security hardening process we need to enable the "Unlisted File Extensions are not allowed" option, however it ends up blocking URLs that should be routed to our WAS server. We added a white list of allowed extensions (htm, html, js, xml,
    etc)., along with a period (".") - which was recommended on the internet. The files from the static site are being served properly, but IIS is still blocking all the Java servlet application calls.

    Is it possible to enable this option for this configuration? Or is IIS truly unable to route extensionless-URLs to WAS?
     
  3. JohnD Win User
    Adding unlisted printer to the Win10 list

    !'m not sure how I did it but all seems well now. It was something like Deacon suggested plus a re-boot or two. It's now listed as a printer, not as unspecified.


    Ensure Unlisted File Extensions are not allowed 192193d1528925959t-adding-unlisted-printer-win10-list-printer.jpg


    Update the list still doesn't work.

    Thanks for your support.

    PS MS's Update catalogue is very useful. E.g. Microsoft Update Catalog
     
  4. Arun B J Win User

    Ensure Unlisted File Extensions are not allowed

    Extensions unresponsive

    Hi,



    I realized your concern and will assist you to resolve the issue.

    I suggest you to follow the steps below and check if it helps.


    • Settings > System > Apps & Features > Uninstall the problem Edge Extension(s)

    • Go to Store > manually search the store for the extension, then install it again.
    After it's installed, click the 'Launch' button and it will take you to Edge where you can set it up.



    Your reply is very important for us to ensure a proper resolution. Please get back to us with the above information in order to assist you accordingly.

    Thanks and regards.
     
Thema:

Ensure Unlisted File Extensions are not allowed

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