samba - Nov 2024 - Accessing Samba domain member shares from trusted domain

Ok well I have that setting you mention

I just can't map my trusted AD account in the trusting domain on my Linux
Samba domain member

I can't see any users in the trusted domain actually

wbinfo -u --domain=TRUSTED

returns nothing at all

I did see an article that suggested the POSIX attributes for AD users need to be
published to the AD global catalogue before they can be accessed in the external
trust domain?  My Wintel AD guys says the attributes are not published.  But
still I might expect to see users listed with wbinfo even if their POSIX
attributes are not allowing use as a UNIX account?

Thanks,

Robert Vaughan
UNIX and Linux Systems
IT - Infrastructure
General Dynamics Land Systems - Canada

Office:   +1 519 964 5276
Mobile:  +1 519 639 8151
vaughar2 at gdls.com



-----Original Message-----
From: samba <samba-bounces at lists.samba.org> On Behalf Of Ralph Boehme
via samba
Sent: Tuesday, November 12, 2024 12:26 PM
To: Vaughan, Robert J <vaughar2 at gdls.com>; samba at lists.samba.org
Subject: Re: [Samba] Accessing Samba domain member shares from trusted domain

On 11/12/24 6:20 PM, Vaughan, Robert J via samba wrote:
> So in my situation where the AD trust is one-way, not transitive, and 
> the trusting domain is external, and both domains are AD (Kerberos 
> only, no NTLM)?
> 
> This should all work for a Samba server domain member in the trusting 
> domain sharing to the trusted domain, where the Samba server cannot 
> see the trusted domain DC/KDC?
yes.

I would make sure to use "winbind scan trusted domains = yes" and
ignore the wbinfo -m and --online-status stuff. As a domain member, we should
only ever talk to a DC of our primary domain and with "winbind scan trusted
domains = yes" that's exactly how we will behave. Trusted domains are
added to our internal list of known domains when a user from a trusted domains
authenticates and will then start appearing in the wbinfo commands, but not
otherwise.

-slow

-- 
SerNet Samba Team Lead https://sernet.de/
Samba Team Member      https://samba.org/
SAMBA+ packages       https://samba.plus/

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On 11/12/24 6:49 PM, Vaughan, Robert J via samba wrote:
> Ok well I have that setting you mention
> 
> I just can't map my trusted AD account in the trusting domain on my
> Linux Samba domain member
> 
> I can't see any users in the trusted domain actually
> 
> wbinfo -u --domain=TRUSTED
> 
> returns nothing at all
this is as expected. We're not allowed to talk to a DC in the trusted
domain to query a user list. That can't be done via a trust route.
> I did see an article that suggested the POSIX attributes for AD
> users need to be published to the AD global catalogue before they
> can be accessed in the external trust domain?  My Wintel AD guys
> says the attributes are not published.  But still I might expect to
> see users listed with wbinfo even if their POSIX attributes are not
> allowing use as a UNIX account?
you can't use idmap_ad for a trusted domain with outbound trust, as we 
can't connect to a DC in that domain via LDAP. You have to use a 
different idmap backend. You could also use idmap_rfc2307 to point at an 
LDAP server that does allow connections and also stores the mappings.

-slow

-- 
SerNet Samba Team Lead https://sernet.de/
Samba Team Member      https://samba.org/
SAMBA+ packages       https://samba.plus/
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