Windows 10: New rules are sometimes added to windows defender firewall (pc was idle 2-3h no updates etc.)

Is my Win 10 compromised?

Or what magical power is adding that?

submitted by /u/PiperidinDerivat
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:)

 

Adding a new rule using Windows Defender Firewall

Hi all. I have an HP All-In-One Desktop running Windows 10 Version 1909, Build 18363.720. I regularly run Windows update and the last update I received, March 12, 2020 is KB4551762 (OS Builds 18362.720 and 18363.720).

I manage my music through an older Logitech Squeezebox Media Server which includes the software media server and a the hardware squeezebox. The PC connects to the hardware through port 9. I've been very happy with the configuration until recently when
it failed and the media server diagnostics confirmed the PC couldn't connect to port 9 which is what the Squeezebox requires.

My primary virus protection is provided by BullGuard Internet Security. I've contacted Bullguard support and through them confirmed that (by turning off BullGuard completely) that the problem is more likely a Windows Defender issue.

My secondary virus protection is provided by Windows Defender.

AT & T provides my internet services. Management of their router goes through the standard IP address 192.168.1.254. There is no rule - outbound or inbound that definitively allows access to that router. When I that address through the PowerShell (Admin)
process it comes back as a general failure. That's the case for the Squeezebox address as well.

I checked the outbound and inbound rules of the Windows defender firewall tool and don't see a specific rule relating to the AT&T router and, while I'm not sure if there ever was one I'm thinking that adding a rule to the router may resolve my issue. I
have never added a firewall rule and would like to do it right.

I'd like some feedback from experts whether I'm heading down the right path, and if so, advice on how to add a new firewall rule - is it an inbound rule or outbound.

FYI, there is an inbound rule which can see which refers to an AllJoyn router which is a TCP rule which refers to port 9955. My own AT&T router is a Cisco brand.

Much obliged. Dan

 

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?

 

Windows Firewall Forgetting Rules

I've recently installed the latest version of Windows 10 in my PC. I've blocked and allowed some softwares in Windows Firewall. But Firewall keeps forgetting the rules in 1/2 days. For example, I've allowed Pro Evolution Soccer 2016 in Firewall. But in a
few days, when I open the game, firewall sends message asking if I want to allow that app or not. Then after checking the allowed apps, I do not see that game in the list, which means firewall didn't remember the settings.

Also, I blocked KMPlayer in firewall to prevent it from connecting to internet (it shows too much ads otherwise). So, I created inbound and outbound rules for KMPlayer and blocked the connection. After that, it was all okay for two days, then again it started
showing ads, and then checking the rules, I didn't notice the rules there which I created two days ago. And this thing keeps happening. I make the inbound and outbound rules for KMPlayer, it stays all okay for a few days, and then it forgets again.

So, what is wrong with the firewall and what is the solution of it?

[Moved from: Windows / Windows 10 / Windows settings]