Re: sshd problem on WS2008R2 64bit

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

On Mar  6 09:45, Bill Stewart wrote:
> On Wed, Mar 6, 2019 at 8:34 AM Corinna Vinschen wrote:
> 
> > On Mar  6 08:38, Bill Stewart wrote:
> > > On Wed, Mar 6, 2019 at 7:34 AM Corinna Vinschen  wrote:
> > > > On Mar  6 15:17, Corinna Vinschen wrote:
> > > > > But the old Systems like Windows 7 don't want to play nice.
> > > > >
> > > > > - On Vista and Windows 7 WOW64, MsV1_0S4ULogon isn't implemented
> > > > >   at all, which required to keep the create_token method
> > > > >   available
> > > > >
> > > > > - On Vista and Windows 7 MsV1_0S4ULogon does not work without
> > > > >   some user logged in locally, even if it's just the cyg_server
> > > > >   service account.
> > > >
> > > > FTR, Windows 8 / Server 2012 is affected as well,
> > > >      Windows 8.1 / Server 2012 R2 is not.
> > > > >
> > > > > Question is, what is a good solution?  Reverting cyglsa as
> > > > > well to allow the old methods to work as before?  This is
> > > > > the opposite of what I had hoped to accomplish :(
> > >
> > > I agree that the new S4U logon method is by far the best solution.
> > >
> > > It seems to me that this MSV1 S4ULogon behavior on versions older than
> NT
> > > 6.3 (Vista/Srv2008/Win7/Srv2008R2/Win8/Srv2012) is not expected.
> > >
> > > What precisely happens when Cygwin uses MSV1 S4ULogon on versions older
> > > than 6.3 before a user has logged on?
> >
> > MsV1S4ULogon returns with STATUS_NOT_SUPPORTED.  Funny status code,
> > given it works if some user already logged in by other means...
> 
> OK, so here's another potential workaround that doesn't require running the
> service as a specific user...
> 
> Create a scheduled task to run using the following settings:
> 
> General -> Run using user account - > choose a local account
> General -> "Run whether user is logged on or not"
> Triggers -> Run at system startup
> Actions -> Start a program -> Program/script: %SystemRoot%\Cystem32\cmd.exe
> Actions -> Start a program -> Add arguments: /c exit
> 
> Full password logon is required (seems we can't use "do not store password"
> option).
> 
> The local account does not have to be a member of Administrators, but it
> does require user right "Log on as a batch job" (SeBatchLogonRight).
> 
> In my prefunctory testing this seems to fix this problem.
> 
> Does this work?

This does indeed work in my local testing on Windows 7, with a local
dummy user just for this scheduled job and sshd running under SYSTEM.

Now, if that's a feasible workaround for users of these older
systems...?


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer

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