[Samba] Samba 3 domain to AD domain migration.

Rowland Penny rpenny at samba.org
Fri Jun 1 13:36:33 UTC 2018

On Fri, 1 Jun 2018 08:56:18 -0400
Nathan Lager via samba <samba at lists.samba.org> wrote:

> Good Morning Samba list,
> I know I don't post here often (or.. maybe ever) but i've been
> watching along for years.
> We're in a situation where we have an aging samba 3 domain.  It acts
> like an old NT domain, samba folks should understand that.  Its just
> where the capabilities of samba3 landed us. 
> For many reasons we want to get off of this domain, and on to
> something more modern, and we've decided that a true windows AD is
> the place to go.  We have a lot of the migration worked out, but
> we're down to one last caveat.  Passwords.  We don't want to force a
> password reset for all of our users.  At least not within the
> timeframe of this migration. So we're trying to find migration
> options that will take the existing samba passwords and migrate them
> over to AD.  The passwords are currently stored in NT4 hashes (one of
> the reasons we want to get off of this domain). 
> So, all that background to ask my question.  Samba 3 to Samba4
> migration MIGHT be an option. 
> https://wiki.samba.org/index.php/Migrating_a_Samba_NT4_Domain_to_Samba_AD_(Classic_Upgrade> 
> I'm an accomplished nix admin, so i'm not afraid to try that upgrade,
> we didnt want to take the time to do that step if we could avoid it. 
> However, since we're stuck on these passwords, i'm wondering if it's
> back on the table.  The problem is, the document doesn't seem to
> directly address passwords.  It doesn't say that it does convert the
> passwords, it also doesn't say that it doesn't.  At least not that
> i've found in the doc. 
> My goal would be to use the samba4 migration as a go-between from
> smb3/nt to Windows AD.  Would migrating to samba4 migrate passwords,
> AND set me up such that I can then use a domain trust, or a windows DC
> joined to the samba4 domain, to replicate passwords over to Windows
> AD?
> Sorry for being long-winded, let me know if you need more info.
> Thanks!

I will be brief:
Yes and Yes, but why migrate to a Windows DC, think of the cost of all
those CALS, not to mention the cost of the DCs, but it is your


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