WSUS server update synchronization error(HTTP error)

Question

Hello,

I am writing to inquire about an issue with the WSUS server update synchronization. We are currently using "Synchronize from Microsoft Update" for updates. The synchronization has been working well until recently, but it has failed several times, and now manual synchronization is also not possible.

The error message received states, "An HTTP error occurred." Upon further investigation, it shows the message "Cannot connect to the remote server," along with the error, "The connection was closed due to a lack of response from a connected member, or the host did not respond 20.114.59.46:443."

Windows updates on the server have been completed, and ports 80 and 443 are open, so I am unsure what the issue might be. This server is currently in use within our organization, and I wanted to check with you before contacting our network team.

Your assistance would be greatly appreciated.

Thank you.

Answer 1

Ensure you are allowing access to the required URLs

https://learn.microsoft.com/en-us/windows-server/administration/windows-server-update-services/deploy/2-configure-wsus#211-configure-your-firewall-to-allow-your-first-wsus-server-to-connect-to-microsoft-domains-on-the-internet

Answer 2

Ensure you're using TLS 1.2 - SchUseStrongCrypto