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[Samba] Share periodical not accessible




Dear mailing list members, 

our Samba server provides several shares, one of them is sometimes (about one time a week) not accessible. The log (level 2) does not provide any hint where the problem could be located, quite contrary to the error message on the mac OS and Windows 10 client side (you have not the required rights), it tells that the authentication is succeeded. Increasing the log level generates more output but from my point of view it does not contain details about the existing problem.

The configuration difference between the affected share and all other shares is that it contains subfolder with different owner and group permissions; the shares that are not affected contains only subfolder with the same owner and group permissions (same like the shares itself).

When the problem comes up, restarting samba/winbind does not change anything - access from client side is furthermore not given. But if I then connect to a share that is not affected and afterwards again to the affected one, the problem is gone (for a week) and access is given.

Any help would be appreciated! Thank you, kind regards
André Harms


--- Extract from log file ---

[2018/05/23 09:05:03.968886,  2] ../source3/auth/auth.c:305(auth_check_ntlm_password)
 check_ntlm_password:  authentication for user [lfcnjlndjfgglngietlvkdtkjkrcetvudikfnbgulriubilrthirgnihlndcnhff] -> [lfcnjlndjfgglngietlvkdtkjkrcetvudikfnbgulriubilrthirgnihlndcnhff] -> [LOPRODUCTS\aharms] succeeded
[2018/05/23 09:05:04.090820,  2] ../lib/util/modules.c:196(do_smb_load_module)
 Module 'acl_xattr' loaded
[2018/05/23 09:05:04.090848,  2] ../source3/modules/vfs_acl_xattr.c:193(connect_acl_xattr)
 connect_acl_xattr: setting 'inherit acls = true' 'dos filemode = true' and 'force unknown acl user = true' for service Transfer
[2018/05/23 09:05:04.091137,  2] ../source3/smbd/service.c:774(make_connection_snum)
 macbook-ah (ipv4:10.1.0.3:59252) connect to service Transfer initially as user LOPRODUCTS\aharms (uid=36107, gid=35514) (pid 8585)
[2018/05/23 09:05:04.208536,  2] ../source3/modules/vfs_acl_xattr.c:193(connect_acl_xattr)
 connect_acl_xattr: setting 'inherit acls = true' 'dos filemode = true' and 'force unknown acl user = true' for service IPC$
[2018/05/23 09:05:17.933197,  2] ../source3/smbd/service.c:1050(close_cnum)
 macbook-ah (ipv4:10.1.0.3:59252) closed connection to service Transfer


--- Configuration details ---

Samba Version 4.3.11-Ubuntu
Winbind Version 4.3.11-Ubuntu
Kernel 4.4.0-122-generic
Windows Server 2016 with AuthLite two factor authentication
Clients: mac OS and Windows 10
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