On Tue, Dec 17, 2019 at 12:48:58PM +0000, Winberg Adam wrote:
> I can confirm that the warning messages in our AD logs are indeed gone after 
> setting
> 
>     ad_maximum_machine_account_password_age = 0
> 
> I would really like SSSD to update the machine account password however, so I 
> look forward to the adcli fix. 

Hi,

thanks for the feedback. The related ticket is
https://bugzilla.redhat.com/show_bug.cgi?id=1762420, currently mostly
private, I'll try to make important updates to the ticket public.

bye,
Sumit

> 
> Thanks!
> 
> //Adam
> 
> 
> ________________________________________
> From: Winberg Adam [adam.winb...@smhi.se]
> Sent: 17 December 2019 07:33
> To: End-user discussions about the System Security Services Daemon
> Subject: [SSSD-users] Re: How do new LDAP security recommendations from MS 
> affect sssd clients?
> 
> aha, adcli is used for the machine account password renewal, of course. I 
> will try to disable that and get back to you.
> 
> This is on RHEL 8.1, btw.
> 
> //Adam
> 
> ________________________________________
> From: Sumit Bose [sb...@redhat.com]
> Sent: 17 December 2019 07:29
> To: sssd-users@lists.fedorahosted.org
> Subject: [SSSD-users] Re: How do new LDAP security recommendations from MS 
> affect sssd clients?
> 
> On Tue, Dec 17, 2019 at 06:18:21AM +0000, Winberg Adam wrote:
> > Hi,
> >
> > We are seeing the same in our AD logs - "The following client performed a 
> > SASL (Negotiate/Kerberos/NTLM/Digest) LDAP bind without requesting signing 
> > (integrity verification)..." - and tried to mitigate this by changing from 
> > GSSAPI to GSS-SPNEGO in SSSD, but this makes no difference, AD keeps 
> > logging warnings.
> >
> > The logs does not origin from starting/stopping sssd, but rather when this 
> > happens:
> >
> > Dec 16 15:25:57  adcli[116149]: GSSAPI client step 1
> > Dec 16 15:25:57  adcli[116149]: GSSAPI client step 1
> > Dec 16 15:25:57  adcli[116149]: GSSAPI client step 1
> > Dec 16 15:25:57  adcli[116149]: GSSAPI client step 2
> >
> > (from 'systemctl status sssd').
> >
> > So even if sssd is configured to use GSS-SPNEGO it seems to trigger adcli 
> > which uses GSSAPI?
> 
> Hi,
> 
> yes, you are right. adcli does not inherit this option from SSSD but
> sets up the connection on its own. I'm working on a fix for adcli as
> well.
> 
> Do I understand correctly that if you disable the renewal of the machine
> account password by setting
> 
>     ad_maximum_machine_account_password_age = 0
> 
> and use GSS-SPNEGO for SSSD there are no messages in the AD logs?
> 
> bye,
> Sumit
> 
> >
> > regards,
> > Adam
> >
> >
> >
> >
> >
> > ________________________________________
> > From: Sumit Bose [sb...@redhat.com]
> > Sent: 11 December 2019 15:55
> > To: End-user discussions about the System Security Services Daemon
> > Subject: [SSSD-users] Re: How do new LDAP security recommendations from MS 
> > affect sssd clients?
> >
> > On Wed, Dec 11, 2019 at 08:14:25AM -0500, Chris P. wrote:
> > > Just wondering if there is any more news regarding the patch for sssd to
> > > work with the new MS requirements?
> > > Curerrently I'm being notified that ALL linux servers are reporting this 
> > > in
> > > the AD logs:
> > >
> > > "...client performed a SASL (Negotiate/Kerberos/NTLM/Digest) LDAP bind
> > > without requesting signing (integrity verification), or performed a simple
> > > bind over a clear text (non-SSL/TLS-encrypted) LDAP connection..."
> >
> > Hi,
> >
> > I forgot to send the patch to use LDAPS for review, I will do it soon.
> >
> > In the meantime please check in the sssd-ldap man page if the option
> > ldap_sasl_mech supports GSS-SPNEGO (recent version of SSSD should do).
> > In this case you can set
> >
> >     ldap_sasl_mech = GSS-SPNEGO
> >
> > in the [domain/...] section of sssd.conf and restart SSSD. Now the error
> > logs in the AD side should at least be gone for this host.
> >
> > HTH
> >
> > bye,
> > Sumit
> >
> > >
> > > We are planning to test a sssd client with a patched AD server to see if
> > > this will break AD auth on our sssd clients, but wanted to see if a patch
> > > for sssd has been made available anywhere to use ldaps or ldap with sssd.
> > >
> > > Thanks,
> > > Chris
> >
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