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RE: Re: Windows 10 Security Update breaks TSVN Auth?

From: Per Salmi <per.salmi_at_gmail.com>
Date: Tue, 27 Sep 2016 13:56:22 -0700 (PDT)

> > The authentication works again if we uninstall the security updates, whichever of them that got installed. But KB3193494, as it is a replacement for KB3189866, will automatically be reinstalled again as soon as Windows Update runs again... so it is not a very good workaround.
>
> Looking at the changes done in that update, we'll find this:
> https://technet.microsoft.com/library/security/MS16-110
>
> "preventing NT LAN Manager (NTLM) Single Sign-On (SSO) authentication to
> non-private SMB resources when users are signed in to Windows via a
> Microsoft Account (https://www.microsoft.com/account) and connected to a
> “Guest or public networks” firewall profile."
>
> And since SSPI is using NTLM auth, I'm guessing that's your problem.
>
> so, to fix this you have to correct what the KB update now prevents:
> * make the SMB private
> * don't connect to a public network but only a private one
>

Thanks! Will try it as soon as I'm back at the office tomorrow. Very likely that I didn't set that network to be a private network!

/Per

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Received on 2016-09-27 22:56:26 CEST

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