Windows update ports.

WindowsGeek 21 Reputation points

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

Thank you.

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,548 questions
Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
12,455 questions
{count} votes

3 answers

Sort by: Most helpful
  1. Sunny Qi 10,916 Reputation points Microsoft Vendor


    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:







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

    Best Regards,


    If the Answer is helpful, please click "Accept Answer" and upvote it.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    0 comments No comments

  2. JorgR 1 Reputation point

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

    0 comments No comments

  3. John Paitaki 6 Reputation points

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

    0 comments No comments