Windows 10: "Allow apps to communicate through Windows Defender Firewall" requires public access on a...

Discus and support "Allow apps to communicate through Windows Defender Firewall" requires public access on a... in Windows 10 Network and Sharing to solve the problem; Hello, I am currently running Windows 10 Pro Build 1909. I am developing a cross-platform application that communicates with my Windows machine... Discussion in 'Windows 10 Network and Sharing' started by TheMohawkNinja, Dec 29, 2020.

  1. "Allow apps to communicate through Windows Defender Firewall" requires public access on a...


    Hello,


    I am currently running Windows 10 Pro Build 1909.


    I am developing a cross-platform application that communicates with my Windows machine over LAN and only references private IP addresses. However, in order to allow the application to connect to the Windows machine, Windows Firewall must be set to allow the application over a public network.


    From a security standpoint, this is obviously unacceptable.


    I understand the answer is likely "update to 20H2" or something to that effect, which is fine, but if that's the case, can I at least be told which KB should be the actual fix for the issue?


    Thank you,

    :)
     
    TheMohawkNinja, Dec 29, 2020
    #1
  2. joelshort Win User

    Defender Firewall will not save "allowed app" rules

    I am having a persistent, ongoing problem with allowing apps through Windows Defender Firewall (Windows 10 Pro 1809). Basically, the firewall is not remembering when I add an app to the list.

    From the control panel I am going to "Allow apps to communicate through Windows Defender Firewall". One of the apps in question is already listed and I need to continually enable it through the Public connection. But the rule doesn't stick.

    Another app is missing from the list so I manually add it, and things work fine for that session. If I restart the system and go back to these rules, the manually added app is no longer in the list, and the already present app in the list has again reverted to Private only. I have to constantly reset these.

    Why won't these apps stick in the allowed apps, and how do I fix it?
     
    joelshort, Dec 29, 2020
    #2
  3. John Sarc Win User
    Windows Firewall blocks App Store from downloading new apps

    Hi,

    Let's try to check if the app store you're referring to if it's really blocked by Windows Firewall. See these steps:

    • Open Windows Firewall from the taskbar >
      Firewall & network protection
      > Allow an app through firewall.
    • A new window will show up containing the list of the apps that ca be allowed through Firewall.
    • Look for the app you want to be accessed, and make sure that the Domain, Private and Public are ticked. That would allow the app store to be accessed.

    Let us know what happens after doing the suggestion.
     
    John Sarc, Dec 29, 2020
    #3
  4. joelshort Win User

    "Allow apps to communicate through Windows Defender Firewall" requires public access on a...

    Windows Defender Firewall - Previously allowed APP disappears

    I'm having an issue with Defender firewall. I manually allow an app through the firewall on both public and private networks. The app works fine. When I restart the computer the approved app is no longer listed and the app does not work properly.

    What I'm trying to do is use Teamviewer to remotely control an Intel NUC via the NUC IP address on a local area network. If I add Teamviewer to the list of apps through the firewall it works fine, but upon restart I cannot login to the NUC with Teamviewer and upon investigation the app is missing from the firewall approved apps.

    This is with Windows 1809.

    I have a second NUC running Windows 1803 and it does not have this problem.

    Any thoughts?
     
    joelshort, Dec 29, 2020
    #4
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