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[Samba] Different behaviour of winbind in 4.8.3




Hi list,

the behaviour of winbind changed in Samba version 4.8.3.

Having this nsswitch.conf:
# cat /etc/nsswitch.conf
passwd:                 compat winbind cache
group:                  compat winbind cache
shadow:                 compat

hosts:                  files dns
networks:               files

protocols:              db files
services:               db files
ethers:                 db files
rpc:                    db files

netgroup:               nis

and this smb.conf:
# cat /etc/samba/smb.conf
[global]
        kerberos method = secrets and keytab
        log file = /var/log/samba/log.%m
        max log size = 1000
        realm = SPREADSHIRT.PRIVATE
        security = ADS
        server role = member server
        server string = %h server (Samba, Ubuntu)
        winbind expand groups = 5
        winbind offline logon = Yes
        winbind separator = +
        workgroup = SPREADSHIRT
        idmap config * : range = 10000 - 19999
        idmap config spreadshirt : range = 1000000 - 19999999
        idmap config spreadshirt : backend = rid
        idmap config * : backend = tdb

There is a user in the domain SPREADSHIRT with the name tmutest.

With Samba 4.8.2 and lower:
# id tmutest
id: ‘tmutest’: no such user

# id SPREADSHIRT+tmutest
uid=1102339(SPREADSHIRT+tmutest) gid=1000513(SPREADSHIRT+domain users)
groups=1000513(SPREADSHIRT+domain
users),1102339(SPREADSHIRT+tmutest),10001(BUILTIN+users)


With Samba 4.8.3:
# id tmutest
uid=1102339(SPREADSHIRT+tmutest) gid=1000513(SPREADSHIRT+domain users)
groups=1000513(SPREADSHIRT+domain
users),1102339(SPREADSHIRT+tmutest),10001(BUILTIN+users)

root@toolbox01 [lej] ~ # id SPREADSHIRT+tmutest
uid=1102339(SPREADSHIRT+tmutest) gid=1000513(SPREADSHIRT+domain users)
groups=1000513(SPREADSHIRT+domain
users),1102339(SPREADSHIRT+tmutest),10001(BUILTIN+users)

Is this intended?
Is it possible to change the behaviour back to pre-4.8.3 by
configuration change?

Thank you.

Best,
Tino

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