Screen Cast blocked by Norton Firewall

Norton 360 for Windows
1

Note: Please do not post Personally Identifiable Information like email address, personal phone number, physical home address, product key etc.

Issue abstract: Norton firewall blocks wireless screen cast to TV.

Detailed description:W11 Norton 360 firewall blocks wireless screen cast from my laptop to my new LG webOS smart TV. When I turn off the Norton Firewall screen cast works.

My other laptop running W10 Norton 360 will successfully screen cast to my TV with the Norton Firewall operational.

I conclude there is a Norton 360 problem with my W11 laptop caused by some recent Norton update, as a few months ago screen cast worked from that very same W11 laptop.

What is the fix, and when will it be available to me?

Why have Norton customers had this problem going on a YEAR now without Norton actually solving this issue?

So far I’ve endured your ineffective chat-bot.

Also endured your ineffective human chat.

Then endured your ineffective human remote control of my laptop by 3 different humans. So glad to provide with logs that you will do nothing with. You’ve already been doing nothing for a year, so why change?

Well I’ve had it with all the intrusive up-sell popups,

the lack of support,

the escalating price,

the dismal user experience.

I’ve canceled my subscription renewal,

and will be sure to relate my unsatisfactory experience to all my friends and colleagues.

No need to thank me, you’ve earned it Norton.

Sincerely,

Paul Murphy

Product & version number:25.9.10453 (build 25.9.10453.0)

OS details:W11

What is the error message you are seeing? N/A

If you have any supporting screenshots, please add them:

2

Oct 2024

lance317

Running latest version of 360 for Windows 11 home.

Miracast screen share only works if I disable Norton.

Can somebody please help me get this working again - only a problem since the new version of Norton installed - nothing on my network has changed.

3

What’s new in Norton Security 25.9.10453?

4

Hmmm… I’m running Norton Security 25.9.10453 and norton firewall is blocking my screen cast.

Welp, seems norton hasn’t fixed this problem with their firewall blocking Screen Cast after a year of this issue!

Is anyone surprised??

5

@paul_murphy2 Hello. Indeed the release notes do say this issue has been identified and corrected. That being said lets get some information that MAY be of help.

In your Norton settings, navigate to Security > Advanced > Smart Firewall. Open the tab labeled “Program Control”. Is there an entry there for Miracast?

In your Security History, are there entries there stating Norton blocked the connection? If so move your mouse cursor to the right and an arrow will appear. Click it and open the advanced details. Can you get a screenshot and post here for us to review? That would help us help you figure out what the issue may be.

Regards,
SA

6

What’s new in Norton 25.2.9898?

Bug fixes:

  • New version is blocking Windows 11 Miracast Screen Sharing to TV
7

As stated in my earlier post, yes that is a part of the release notes in that announcement. The latest version is 25.9.10453 (build 25.9.10453.0) which you are running. Something changed with the last update so lets try to find out what.

SA

8

In my original post you can see screen cast worked in the past on this W11 laptop, so one of the norton updates has broken it. It does work if I turn off the firewall.

I’ve had 3 different norton humans rooting around my laptop via remote control session. Still screen cast will only work if I turn off the norton firewall on my W11 laptop.

norton has been ineffectively chasing this problem for nearly a year. Instead norton is spending all of their time adding up-sell pop-ups to the software. Pathetic.

On my other Laptop running W10, screen cast works as it is supposed to. For now at least. Until some future update that is.

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Does your Norton history show entries where this was blocked?

SA

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14

Just to be clear, I’m using Windows Screen Cast and not Miracast.

There are however issues with both methods of screen mirroring going back almost a year.

15

The more I search, the more I see norton sitting on their hands.

Note the date on this norton document : Last modified: 02/20/2025

Norton 360 app blocks wireless screen sharing on Windows

Applicable for: Windows,Windows 10 in S Mode

We are aware of an ongoing issue with the Norton 360 app where the Norton Smart Firewall feature blocks the wireless screen sharing on your device. We are working on fixing this issue in an upcoming release.

Meanwhile, you can try the below the steps to resolve this issue:

  1. Restart your computer and try wireless screen sharing now. If you still have issues, then try step 2.

  2. Make sure that your Windows operating system is up to date. For more details, refer to the Install Windows Updates article. If you still have issues, then try step 3.

  3. Run Norton LiveUpdate. For detailed instructions on how to run Norton LiveUpdate, refer to Run LiveUpdate.

DocID: v20250102055127552
Last modified: 02/20/2025

16

I tried giving “App permissions” to CastSrv.exe, reboot W11, then tried to cast to my TV. Still couldn’t screen cast. Then tried adding CastSrv.exe to “Program Control”. Still couldn’t screen cast. When I looked at the Security History, no entries were listed as blocked, but the screen cast still couldn’t connect. Seems norton has broken the screen cast function in a way that makes user troubleshooting untenable. “Traffic Rules” settings are locked out to the user, so I can’t modify port settings or UDP protocols. I’m out of ideas on this, and norton doesn’t seem to be working on this issue with any regard to time for a solution. I’ve been charged USD 126.59 for my subscription, and I can’t access a basic function of my laptop. My norton experience is unsatisfactory, and a sincerely concerned entity would offer me a refund. Not holding my breath, and expect to switch to Bitdefender Premium Security while abandoning my remaining subscription. Gen Digital Inc. seems to have degraded norton software, as well as their customer service. Can’t even email them, so no continuity of support whatsoever.

17

No entry for Miracast in “Program Control”, but in App permissions I tried “Wireless Display” which has location listed as

“C:\Windows\SystemApps\Microsoft.PPIProjection_cw5n1h2txyewy\Receiver.exe"

Screen cast to TV still not working. Nothing shows as blocked in Security History.

18

Just manually added “C:\Windows\SystemApps\Microsoft.PPIProjection_cw5n1h2txyewy\Receiver.exe" to the “Program Control” by selecting “More, Allow new app”. Screen cast to TV still not working. Nothing shows as blocked in Security History.

19

From an AI internet search:

When you select the cast display option in Windows 11, the system primarily utilizes the Connect app or related system processes to handle the casting functionality. Specifically, the WirelessDisplay feature is responsible for enabling screen mirroring or casting to external displays.

Here’s a breakdown of what happens:

  1. Executable File: The process is managed by svchost.exe, which hosts various system services, including those related to casting and wireless display functionality.

  2. Feature Dependency: The Wireless Display feature (part of the Miracast protocol) is required. If not already installed, you may need to add it via:

    • Settings > Apps > Optional Features > Add a Feature > Wireless Display.

  3. UI Interaction: The casting interface is accessed through ms-settings:connect, which opens the “Connect” settings in Windows.

This process ensures seamless communication between your PC and the target device, such as a TV or wireless monitor.

20

After reading the above breakdown of screen cast, I manually added “C:\Windows\System32\svchost.exe” to the App permissions. Still unable to cast to my TV unless I turn norton firewall off. Hmmm…

Interestingly (to me anyway) using the optional features “Wireless Display” I was able to cast my W11 laptop screen to my W10 laptop with both norton firewalls on. I was also able to cast my W10 laptop to my W11 laptop with both firewalls on.

I cannot fathom what norton has done to so thoroughly break the regular W11 screen cast that was working for me before some recent update. I am again out of ideas. I wish norton would get busy and at long last put out a comprehensive fix to the W11 screen cast.