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Old 07-14-2014, 09:06 AM   #1
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Registered: Jul 2014
Posts: 1

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Samba Authentication with Kerberos Server

Hi all, I have a server that I have set up to authenticate successfully using sssd, everything works great, I can SSH into the server as user in the LDAP and get all my details.

However, I'm now trying to set up authentication in Samba with very little luck! I'm really clueless with this stuff so please be gentle.

 default_realm = EXAMPLE.CO.UK
 dns_lookup_realm = true
 dns_lookup_kdc = true
 ticket_lifetime = 24h
 renew_lifetime = 7d
 forwardable = true

  kdc =
  admin_server =
  default_domain =

[domain_realm] = EXAMPLE.CO.UK = EXAMPLE.CO.UK


	workgroup 	= EXAMPLE.CO.UK
	server string 	= Samba Server Version %v
	netbios name 	= store 
        guest ok 	= no 
        clustering 	= yes
	security 	= domain

# is the IP of
	password server =
	encrypt passwords = yes
	realm		= EXAMPLE.CO.UK
        template shell 	= /bin/bash
	log file = /var/log/samba/log.%m
	max log size = 50
	log level = 3
       comment = GPFS profile Shared Data
       public = yes
       path = /gpfs/profile
       writeable = yes
       ea support = yes
       create mask = 0775
        security mask = 0777
        force security mode = 000
        directory security mask = 0770
        force directory security mode = 000
	valid users = %S
	valid users = EXAMPLE.CO.UK\%S
I'm pretty sure it's something wrong in the [global] tag of my samba file but I'm struggling to work out what I need to put in there, possibly the 'security' option.

Right now, I can connect to the server via samba, if I then click the 'profile' share, it prompts me to log in. Inputting the credentials gives me the following error in the logs and I don't understand why:

[2014/07/14 15:01:55.637873,  3] libsmb/trusts_util.c:166(enumerate_domain_trusts)
  enumerate_domain_trusts: can't locate a DC for domain EXAMPLE.CO.UK
[2014/07/14 15:01:55.638111,  3] auth/auth.c:219(check_ntlm_password)
  check_ntlm_password:  Checking password for unmapped user [EXAMPLE.CO.UK]\[]@[MYHOSTNAME] with the new password interface
[2014/07/14 15:01:55.638176,  3] auth/auth.c:222(check_ntlm_password)
  check_ntlm_password:  mapped user is: [EXAMPLE.CO.UK]\[]@[HOSTNAME]
[2014/07/14 15:01:55.638336,  3] libsmb/namequery.c:2533(get_dc_list)
  get_dc_list: preferred server list: ","
[2014/07/14 15:02:05.640555,  2] auth/auth.c:319(check_ntlm_password)
  check_ntlm_password:  Authentication for user [] -> [] FAILED with error NT_STATUS_NO_LOGON_SERVERS
[2014/07/14 15:02:05.640720,  3] smbd/error.c:81(error_packet_set)
  error packet at smbd/sesssetup.c(124) cmd=115 (SMBsesssetupX) NT_STATUS_NO_LOGON_SERVERS
[2014/07/14 15:02:05.641064,  1] smbd/process.c:457(receive_smb_talloc)
  receive_smb_raw_talloc failed for client read error = NT_STATUS_CONNECTION_RESET.
[2014/07/14 15:02:05.641257,  3] smbd/server_exit.c:181(exit_server_common)
  Server exit (failed to receive smb request)
Why does it say no logon servers when I'm pointing at the Kerberos server? Do I also need to add LDAP information in there too?
Old 07-16-2014, 03:28 PM   #2
Senior Member
Registered: Jan 2008
Distribution: Arch/Manjaro, might try Slackware again
Posts: 1,851
Blog Entries: 14

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You don't say which distro you're using, or what you did exactly so far, or if you followed a guide, so it might be hard to figure out where you are right now. Having said that, try looking at what I did here:

as well as some of the links in the blog, perhaps that will help.


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