[Samba] 'getent group mygroup' fails when 'winbind use default domain = yes'

Rowland penny rpenny at samba.org
Thu May 13 17:43:36 UTC 2021

On 13/05/2021 17:47, Kees van Vloten wrote:
> Hi Rowland,
> Sorry about the incomplete info.
> I am using Samba 4.14 from Louis' repo on Debian buster.
> There are no local users above 1000 and indeed all users uidNumber and 
> gidNumber set and all groups that can appear as a unix-group have a 
> gidNumber.
> An example of something that works:
> id test3
> uid=2000(test3) gid=2000(grp_test3) 
> groups=2000(grp_test3),100016(domain 
> users),100014(acl-smb_share_group-full),100002(acl-servers_all-user_access),100003(acl-servers_all-sudo_root),100012(acl-smb_share_windows_deploy-full),100009(acl-app_wireshark-access),100008(acl-app_netdata-access),100018(acl-app_rspamd-access),100017(acl-app_servicedesk-access),1000001(BUILTIN\users)
> Then when I try 'chgrp grp_test3 testfile' that fails because 'getent 
> group grp_test3' fails.
> - Kees.

OK, First, remove this line: idmap_ldb:use rfc2307 = yes
It should only be in a DC smb.conf
I don't think it has anything to do with your problem, but it shouldn't 
be there.

Lets double check the gidNumber attributes are there:

ldbsearch -H ldap://$(hostname -s) -b "$(echo "dc=$(hostname -d)" | sed 
's/\./,dc=/g')" -s sub '(&(objectClass=group)(sAMAccountName=Domain 
Users))' gidNumber -P | grep 'gidNumber' | sed 's/gidNumber: //'

This should result in '100016'

ldbsearch -H ldap://$(hostname -s) -b "$(echo "dc=$(hostname -d)" | sed 
's/\./,dc=/g')" -s sub 
'(&(objectClass=group)(sAMAccountName=grp_test3))' gidNumber -P | grep 
'gidNumber' | sed 's/gidNumber: //'

This should result in '2000'

Lets go from there.


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