Windows update ports.

Question

Hello,
I want my Windows can't connect to the Internet, but receive updates. Which ports must be open?

Thank you.

Answer 1

Hi,

Thanks for posting in Q&A platform.

Windows update uses port 80 for HTTP and port 443 for HTTPS.

Please check the documents as below:

If there is a corporate firewall between WSUS and the Internet, you might have to configure that firewall to ensure WSUS can obtain updates. To obtain updates from Microsoft Update, the WSUS server uses port 443 for HTTPS protocol. Although most of corporate firewalls allow this type of traffic, there are some companies that restrict Internet access from the servers due the company's security policies. If your company restricts access, you need to obtain authorization to allow Internet access from WSUS to the following list of URLs:

http://windowsupdate.microsoft.com

http://*.windowsupdate.microsoft.com

https://*.windowsupdate.microsoft.com

http://*.update.microsoft.com

https://*.update.microsoft.com

http://*.windowsupdate.com

http://download.windowsupdate.com

https://download.microsoft.com

http://*.download.windowsupdate.com

http://wustat.windows.com

http://ntservicepack.microsoft.com

http://go.microsoft.com

http://dl.delivery.mp.microsoft.com

https://dl.delivery.mp.microsoft.com

For more details, please refer to the following official article:

https://learn.microsoft.com/en-us/windows-server/administration/windows-server-update-services/deploy/2-configure-wsus

Best Regards,
Sunny

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Answer 2

This is for Windows Server only. What are the URLs for Win 10 Pro Clients ?

Answer 3

Windows Update requires TCP port 80, 443, and 49152-65535.

Answer 4

gotta love it when the provided URL's don't even work.

"The following input errors were detected: Could not fetch the URL 'http://windowsupdate.microsoft.com/'."

GG.