[Samba] win bind extremely slow after Upgrade to 4.2

Oliver Werner oliver.werner at kontrast.de
Wed Apr 27 07:36:01 UTC 2016


we have upgrade an Samba Member (DCs already upgraded) from Samba 4.1.17 to Samba 4.2.10.

On DCs work fine after install winbind.

But our member extremely slow.

Connect to the Share takes 2-3 minutes and directory listing need 2-5 minutes.

wbinfo -u takes around 20 seconds and will not return output

wbinfo -g takes 3 seconds and show my groups

id user.name takes 20 seconds and shows information  of the user and its groups

smb.conf for samba member:

       netbios name = PL0024
       security = ADS
       workgroup = HQKONTRAST
       realm = hq.kontrast

       log file = /var/log/samba/%m.log
       log level = 1

       dedicated keytab file = /etc/krb5.keytab
       kerberos method = secrets and keytab
       winbind refresh tickets = yes

       winbind trusted domains only = no
       winbind use default domain = yes
       winbind enum users  = yes
       winbind enum groups = yes
      winbind cache time = 60

       # Default idmap config used for BUILTIN and local accounts/groups
       idmap config *:backend = tdb
       idmap config *:range = 500-1023

       # idmap config for domain HQKONTRAST
       idmap config HQKONTRAST:backend = ad
       idmap config HQKONTRAST:schema_mode = rfc2307
       idmap config HQKONTRAST:range = 1024-99999

       # Use settings from AD for login shell and home directory
       winbind nss info = rfc2307

smb.conf DC:

	workgroup = HQKONTRAST
	realm = HQ.KONTRAST
	netbios name = VL0227
	server role = active directory domain controller
	idmap_ldb:use rfc2307 = yes
	interfaces = eth0:35 eth0:38
  	bind interfaces only=yes
	log level = 3

	ldap server require strong auth = no

	tls enabled  = yes
	tls keyfile  = /var/lib/samba/private/tls/key.pem
	tls certfile = /var/lib/samba/private/tls/cert.pem
	tls cafile   = /var/lib/samba/private/tls/ca.pem

	path = /var/lib/samba/sysvol/hq.kontrast/scripts
	read only = No

	path = /var/lib/samba/sysvol
	read only = No


Kontrast Communication Services GmbH
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax  +49-211-91505-530
www.kontrast.de <http://www.kontrast.de/>

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der Vlist

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