Hi Team,

Sorry for the late reply. We are really confused about the behaviour of
sssd. We have one machine whose net ads testjoin shows join failed but
still I am able to authenticate via my AD ID. Can you help us why is it
happening ? It present us to the confusion as what is really right
configuration that will remain persistent and not break AD authentication
even after server reboot. Below are the output of some important files but
do let me know if you need some extra information.

net ads test join output

```
kerberos_kinit_password [email protected] failed: Preauthentication failed
kerberos_kinit_password [email protected] failed: Preauthentication failed
Join to domain is not valid: Logon failure
```

smb.conf
```
[global]
        workgroup = ADADMIN
        client signing = yes
        client use spnego = yes
        kerberos method = secrets and keytab
        log file = /var/log/samba/%m.log
        realm = AD.ADMIN
        security = ads
        netbios name = example1
        disable netbios = yes
        log file = /var/log/samba/log.%m
         max log size = 50
         load printers = yes
         cups options = raw

[homes]
        comment = Home Directories
        browseable = no
        writable = yes

[printers]
        comment = All Printers
        path = /var/spool/samba
        browseable = no
        guest ok = no
        writable = no
        printable = yes
```

sssd.conf

```
[sssd]
services = nss, pam
config_file_version = 2
reconnection_retries = 3
sbus_timeout = 30
domains = ad.admin

[nss]
filter_groups = root
filter_users = root
reconnection_retries = 3[pam]reconnection_retries = 3
[domain/ad.admin]
id_provider = ad
cache_credentials = True
access_provider = simple
ldap_id_mapping = True
use_fully_qualified_names = False
ad_domain = ad.admin
enumerate = false
ldap_deref_threshold = 0
ldap_use_tokengroups = False
debug_level = 3
[autofs]
```

krb5.conf

```
logging]
  default = FILE:/var/log/krb5libs.log
  kdc = FILE:/var/log/krb5kdc.log
  admin_server = FILE:/var/log/kadmind.log

[libdefaults]
  default_realm = AD.ADMIN
  dns_lookup_realm = false
  dns_lookup_kdc = true
  ticket_lifetime = 24h
  renew_lifetime = 7d
  forwardable = true
```

Regards
Sachin Kumar

On Wed, May 3, 2023 at 3:39 PM Sumit Bose <[email protected]> wrote:

> Am Wed, May 03, 2023 at 12:17:31PM +0530 schrieb Sac Isilia:
> > Hi Team,
> >
> > We are using sssd in our environment for authentication of AD users. But
> it
> > disconnect from domain for unknown reasons.
> >
> > Can someone help if there is some best practice or script that
> > automatically rejoin the server to domain as soon as it disconnects? It
> has
> > become pain for us to do it manually.
>
> Hi,
>
> how often does this happen for a single host? If it is around every 30
> days then most probably the automatic renewal of the machine account
> password failed. If in your environment computers are not required to
> renew their password every 30 days you can disable this feature by
> setting
>
>     ad_maximum_machine_account_password_age = 0
>
> in the [domain/...] section of sssd.conf and restart SSSSD, see 'man
> sssd-ad' for details.
>
> If you want to debug the issue I suggest to use a test host which is
> currently working and set
>
>     ad_maximum_machine_account_password_age = 1
>     debug_level = 9
>
> in the [domain/...] section of sssd.conf and restart SSSD. This will
> tell SSSD to try to renew the machine account password if it is older
> than one day and write a detailed debug log.
>
> Which version of SSSD are you using and on which platform?
>
> bye,
> Sumit
>
> >
> > Regards
> > Sachin Kumar
>
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