Hi Metze,

Your patience is appreciated while I continue to investigate your question 
regarding ServerAuthenticateKerberos(). I'll share an update as soon as I have 
one.

Regards,
Kristian Smith
Support Escalation Engineer | Microsoft® Corporation
Email: kristian.sm...@microsoft.com

-----Original Message-----
From: Kristian Smith 
Sent: Wednesday, December 18, 2024 10:05 AM
To: Stefan Metzmacher <me...@samba.org>
Cc: cifs-protocol@lists.samba.org; Microsoft Support <supportm...@microsoft.com>
Subject: RE: [EXTERNAL] ServerAuthenticateKerberos() not usable for - 
TrackingID#2412180040010640

[Mike to Bcc]

Hi Metze,

Thanks for reaching out with your question. I'll be looking into this issue and 
will be in touch as soon as I have information to share.

Regards,
Kristian Smith
Support Escalation Engineer | Microsoft® Corporation
Email: kristian.sm...@microsoft.com

-----Original Message-----
From: Michael Bowen <mike.bo...@microsoft.com> 
Sent: Wednesday, December 18, 2024 9:14 AM
To: Stefan Metzmacher <me...@samba.org>
Cc: cifs-protocol@lists.samba.org; Microsoft Support <supportm...@microsoft.com>
Subject: RE: [EXTERNAL] ServerAuthenticateKerberos() not usable for - 
TrackingID#2412180040010640

[DocHelp to bcc]

Hi Stefan,

Thanks for your question about Kerberos authentication. I have created case 
number 2412180040010640 to track this issue, please leave the number in the 
subject line when communicating with our team. One of our engineers will 
contact you soon.

Best regards,
Michael Bowen
Sr. Escalation Engineer - Microsoft® Corporation
 
-----Original Message-----
From: Stefan Metzmacher <me...@samba.org> 
Sent: Wednesday, December 18, 2024 7:00 AM
To: Interoperability Documentation Help <doch...@microsoft.com>
Cc: cifs-protocol@lists.samba.org
Subject: [EXTERNAL] ServerAuthenticateKerberos() not usable for

Hi DocHelp,

while implementing ServerAuthenticateKerberos() in Samba, I found a strange 
behavior when using it for TrustedDnsDomainSecureChannel.

When I'm using it as a client the following LogonGetCapabilities() gets 
ACCESS_DENIED.

For all other network visible NETLOGON_SECURE_CHANNEL_TYPE values:
WorkstationSecureChannel, ServerSecureChannel, CdcServerSecureChannel and even 
TrustedDomainSecureChannel (used for downlevel NT4 trusts) it works as expected.

I'm testing with a Windows 2025 preview build, but I guess there are no related 
changes compared to the final version...

I also noticed that the Windows DC doesn't try to use 
ServerAuthenticateKerberos() when connecting to a DC of a trusted domain.

Is this behavior intended?
Is there a flag on the TDO object to allow it to work?

I've attached a network capture that shows the problem.

The problem happens in frames 1528-1531.
All others are just there to show it's working...

With a nightly build of wireshark you should be able to decrypt all kerberos 
and netlogon secure channel traffic.

Thanks for any help you can provide!
metze

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