When UWF is enabled in Windows 10 IoT LTSC, the firewall blocks incoming connections regardless of the firewall rules. I find this in the event log each time: "Windows Firewall was unable to notify the user that it blocked an application from accepting incoming connections on the network." When UWF is disabled, everything works as it should and the application functions correctly without errors. When UWF is enabled, and only when UWF is enabled...
- The firewall blocks incoming connections even though there are rules defined to allow incoming connections to the application, both TCP and UDP, on all ports, on any IP address.
- Windows Defender fails to notify the user that the onnection was blocked, which causes considerable confusion.
This issue is consistent and reproducible on multiple systems. I have found one other complaint about this issue on the internet, but no answers. How can I resolve this without disabling the firewall completely? Is there a work-around such as a UWF exclusion to address this issue?
Thanks in advance,
Andy
PS. Here is the log entry:
Log Name: Security
Source: Microsoft-Windows-Security-Auditing
Date: 3/15/2025 10:59:52 AM
Event ID: 5032
Task Category: Other System Events
Level: Information
Keywords: Audit Failure
User: N/A
Computer: KLY23
Description:
Windows Firewall was unable to notify the user that it blocked an application from accepting incoming connections on the network.
Error Code: 2