[Samba] sssd + samba4 not working (yet)

Wed Feb 19 23:52:34 MST 2014

Nope. Same problem. And I think it is all being caused by ldapsearch not
working as it should.

On Wed, Feb 19, 2014 at 11:20 PM, Rowland Penny <rowlandpenny at googlemail.com
> wrote:

>  On 19/02/14 21:17, Kenneth Westelinck wrote:
>
> While still trying to compile a newer version of sssd, I started to read
> parts of the sssd documentation. I found this:
>
> ---------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<----------
>
> f using SASL/GSSAPI to bind to AD also test that the keytab is working
> properly:
>
> *klist -ke*
>
> *kinit -k CLIENT$@AD.EXAMPLE.COM <http://AD.EXAMPLE.COM>*
>
> If you generated your keytab with a different createupn argument, it's
> possible this won't work and the following works instead. This is
> absolutely fine as far as sssd is concerned, and you can instead generate a
> ticket for the upn you have created:
>
> *kinit -k -t /etc/krb5.keytab 'nfs/client.ad.example.com at AD.EXAMPLE.COM
> <http://AD.EXAMPLE.COM>'*
>
> Now using this credential you've just created try fetching data from the
> server with *ldapsearch* (in case of issues make sure
> */etc/openldap/ldap.conf* does not contain any unwanted settings):
>
> */usr/bin/ldapsearch -H ldap://server.ad.example.com/
> <http://server.ad.example.com/> -Y GSSAPI -N -b "dc=ad,dc=example,dc=com"
> "(&(objectClass=user)(sAMAccountName=aduser))"*
>
> By using the credential from the keytab, you've verified that this
> credential has sufficient rights to retrieve user information.
>
> After both *kinit* and *ldapsearch* work properly proceed to actual SSSD
> configuration.
>
> ---------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<-------------------------8<----------
>  In my case this translates to:
>  root at bubba3-one:~# kinit -k -t /etc/krb5.sssd.keytab '
> bubba3-one$@EARTH.LOCAL'
> root at bubba3-one:~# ldapsearch -H ldap://bubba3-one.earth.local/ -Y GSSAPI
> -N -b "dc=earth,dc=local" "(&(objectClass=user)(sAMAccountName=kenneth))"
> SASL/GSSAPI authentication started
> ldap_sasl_interactive_bind_s: Local error (-2)
>         additional info: SASL(-1): generic failure: GSSAPI Error:
> Unspecified GSS failure.  Minor code may provide more information (Server
> not found in Kerberos database)
> root at bubba3-one:~#
>
>  tcpdump tells me this:
> ...
>  22:10:27.701218 IP buba3-one.earth.local.48796 >
> buba3-one.earth.local.domain: 34430+ SRV?
> _kerberos-master._udp.EARTH.LOCAL. (51)
> 22:10:27.701862 IP buba3-one.earth.local.domain >
> buba3-one.earth.local.48796: 34430 NXDomain* 0/1/0 (104)
> 22:10:27.702890 IP buba3-one.earth.local.57167 >
> buba3-one.earth.local.domain: 57336+ SRV?
> _kerberos-master._tcp.EARTH.LOCAL. (51)
> 22:10:27.703696 IP buba3-one.earth.local.domain >
> buba3-one.earth.local.57167: 57336 NXDomain* 0/1/0 (104)
> 22:10:27.706413 IP buba3-one.earth.local.60088 >
> buba3-one.earth.local.ldap: Flags [P.], seq 1:8, ack 1, win 1025, options
> [nop,nop,TS val 20922020 ecr 20922002], length 7
> 22:10:27.706477 IP buba3-one.earth.local.ldap >
> buba3-one.earth.local.60088: Flags [.], ack 8, win 1024, options
> [nop,nop,TS val 20922020 ecr 20922020], length 0
> 22:10:27.707236 IP buba3-one.earth.local.60088 >
> buba3-one.earth.local.ldap: Flags [F.], seq 8, ack 1, win 1025, options
> [nop,nop,TS val 20922020 ecr 20922020], length 0
> 22:10:27.707426 IP buba3-one.earth.local.ldap >
> buba3-one.earth.local.60088: Flags [F.], seq 1, ack 9, win 1024, options
> [nop,nop,TS val 20922020 ecr 20922020], length 0
> 22:10:27.707474 IP buba3-one.earth.local.60088 >
> buba3-one.earth.local.ldap: Flags [.], ack 2, win 1025, options [nop,nop,TS
> val 20922020 ecr 20922020], length 0
> 22:10:37.989185 IP buba3-one.earth.local.ldap >
> sonia.1.168.192.in-addr.arpa.39196: Flags [P.], seq 1035:1216, ack 404, win
> 1726, options [nop,nop,TS val 20923049 ecr 224407943], length 181
> 22:10:37.989714 IP sonia.1.168.192.in-addr.arpa.39196 >
> buba3-one.earth.local.ldap: Flags [.], ack 1216, win 353, options
> [nop,nop,TS val 225308045 ecr 20923049], length 0
> 22:10:37.989983 IP sonia.1.168.192.in-addr.arpa.39196 >
> buba3-one.earth.local.ldap: Flags [P.], seq 404:441, ack 1216, win 353,
> options [nop,nop,TS val 225308045 ecr 20923049], length 37
> 22:10:37.990213 IP sonia.1.168.192.in-addr.arpa.39196 >
> buba3-one.earth.local.ldap: Flags [F.], seq 441, ack 1216, win 353, options
> [nop,nop,TS val 225308046 ecr 20923049], length 0
> 22:10:38.023995 IP buba3-one.earth.local.ldap >
> sonia.1.168.192.in-addr.arpa.39196: Flags [R.], seq 1216, ack 442, win
> 1726, options [nop,nop,TS val 20923052 ecr 225308045], length 0
>
>  I am not an expert, but I think it means he's searching for
> _kerberos_master._udp.EARTH.LOCAL
> This one does not exist :(
> This one exists though:
>  root at bubba3-one:~# host -t SRV _kerberos._udp.earth.local
> _kerberos._udp.earth.local has SRV record 0 100 88 bubba3-one.earth.local.
> root at bubba3-one:~#
>
>  These _bla._tcp (or _udp) hostnames are synced during the dnsupdate
> process. Syncing _kerberos_master is not part of that sync process.
> Since the ldapsearch is not working, I am pretty sure this is the reason
> why sssd is failing:
>
>  root at bubba3-one:~# sssd -i -d3
> (Wed Feb 19 22:15:18:476155 2014) [sssd] [check_file] (0x0020): lstat for
> [/var/run/nscd/socket] failed: [2][No such file or directory].
> (Wed Feb 19 22:15:18 2014) [sssd] [server_setup] (0x0080): CONFDB:
> /var/lib/sss/db/config.ldb
> (Wed Feb 19 22:15:18 2014) [sssd] [sbus_new_server] (0x0080): D-BUS Server
> listening on
> unix:path=/var/lib/sss/pipes/private/sbus-monitor,guid=135feef4d0e0b9d7d08b26bb53051ee6
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [server_setup] (0x0080):
> CONFDB: /var/lib/sss/db/config.ldb
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_context_init] (0x0080):
> Created new fail over context, retry timeout is 30
> (Wed Feb 19 22:15:18 2014) [sssd] [monitor_service_init] (0x0080):
> Initializing D-BUS Service
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [sbus_new_server] (0x0080):
> D-BUS Server listening on
> unix:path=/var/lib/sss/pipes/private/sbus-dp_default.3584,guid=d52d8dead3406dd979958e2d53051ee6
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_new_service] (0x0080):
> Creating new service 'LDAP'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_add_server] (0x0080):
> Adding new server 'bubba3-one.earth.local', to service 'LDAP'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_new_service] (0x0080):
> Creating new service 'KERBEROS'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_add_server] (0x0080):
> Adding new server 'bubba3-one.earth.local', to service 'KERBEROS'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_add_server] (0x0080):
> Adding new server 'bubba3-one.earth.local', to service 'KERBEROS'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_new_service] (0x0080):
> Creating new service 'KPASSWD'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [fo_add_server] (0x0080):
> Adding new server 'bubba3-one.earth.local', to service 'KPASSWD'
> (Wed Feb 19 22:15:18 2014) [sssd[be[default]]] [sssm_simple_access_init]
> (0x0020): No rules supplied for simple access provider. Access will be
> granted for all users.
> (Wed Feb 19 22:15:19 2014) [sssd[be[default]]] [be_process_init] (0x0020):
> No Session module provided for [default] !!
> (Wed Feb 19 22:15:19 2014) [sssd[be[default]]] [be_process_init] (0x0020):
> No host info module provided for [default] !!
> (Wed Feb 19 22:15:19 2014) [sssd[be[default]]] [main] (0x0020): Backend
> provider (default) started!
> (Wed Feb 19 22:15:19 2014) [sssd[nss]] [server_setup] (0x0080): (Wed Feb
> 19 22:15:19 2014) [sssd[pam]] [server_setup] (0x0080): CONFDB:
> /var/lib/sss/db/config.ldb
> (Wed Feb 19 22:15:19 2014) [sssd] [monitor_service_init] (0x0080):
> Initializing D-BUS Service
> CONFDB: /var/lib/sss/db/config.ldb
> (Wed Feb 19 22:15:19 2014) [sssd] [monitor_service_init] (0x0080):
> Initializing D-BUS Service
> (Wed Feb 19 22:15:19 2014) [sssd[pam]] [sss_process_init] (0x0020): (Wed
> Feb 19 22:15:19 2014) [sssd[nss]] [sss_process_init] (0x0020): Responder
> Initialization complete
> Responder Initialization complete
> (Wed Feb 19 22:15:19 2014) [sssd[nss]] [nss_process_init] (0x0020): NSS
> Initialization complete
> (Wed Feb 19 22:15:29 2014) [sssd[be[default]]] [sasl_bind_send] (0x0020):
> ldap_sasl_bind failed (-2)[Local error]
> (Wed Feb 19 22:15:29 2014) [sssd[be[default]]] [fo_resolve_service_send]
> (0x0020): No available servers for service 'LDAP'
> (Wed Feb 19 22:15:29 2014) [sssd[be[default]]] [sdap_id_op_connect_done]
> (0x0020): Failed to connect, going offline (5 [Input/output error])
> (Wed Feb 19 22:15:29 2014) [sssd[be[default]]] [be_run_offline_cb]
> (0x0080): Going offline. Running callbacks.
>
>
>  Any bright ideas. (Sorry if these are all stupid questions ... this
> stuff is all very new to me and I think I am getting close :) )
> Thanks!
>
>
>  regards,
>
>  Kenneth
>
> Hi, would you like to try this sssd.conf? it is based on a working (for me
> on mint 15) sssd.conf:
>
>
> [sssd]
> services = nss, pam
> config_file_version = 2
> domains = earth.local
>
> [nss]
>
> [pam]
>
> [domain/earth.local]
> description = AD domain with Samba 4 server
>
> # on large directories, you may want to disable enumeration for
> performance reasons
> enumerate = true
> id_provider = ldap
>
> auth_provider = krb5
> chpass_provider = krb5
> access_provider = ldap
>
>
> krb5_server = bubba3-one.earth.local
> krb5_kpasswd = bubba3-one.earth.local
> krb5_realm = EARTH.LOCAL
>
> ldap_krb5_keytab = /etc/krb5.sssd.keytab
> ldap_referrals = false
> ldap_schema = rfc2307bis
> ldap_access_order = expire
> ldap_account_expire_policy = ad
> ldap_force_upper_case_realm = true
> ldap_sasl_mech = GSSAPI
> ldap_sasl_authid = bubba3-one$@EARTH.LOCAL
>
>
> ldap_user_object_class = user
> ldap_user_name = samAccountName
> ldap_user_home_directory = unixHomeDirectory
> ldap_user_principal = userPrincipalName
>
> ldap_group_object_class = group
> ldap_group_name = sAMAccountName
>
>
> Rowland
>
>