sssd-users October 2017

sssd-users@lists.fedorahosted.org

33 participants
34 discussions

sssd performance on large domains
by zfnoctis＠gmail.com 03 Feb '22

03 Feb '22

Hi, I'm wondering if there are any plans to improve sssd performance on large active directory domains (100k+ users, 40k+ groups), or if there are settings I am not aware of that can greatly improve performance, specifically for workstation use cases. Currently if I do not set "ignore_group_members = True" in sssd.conf, logins can take upwards of 6 minutes and "sssd_be" will max the CPU for up to 20 minutes after logon, which makes it a non-starter. The reason I want to allow group members to be seen is that I want certain domain groups to be able to perform elevated actions using polkit. If I ignore group members, polkit reports that the group is empty and so no one can elevate in the graphical environment. Ultimately this means that Linux workstations are at a severe disadvantage since they cannot be bound to the domain and have the normal set of access features users and IT expect from macOS or Windows. Distributions used: Ubuntu 16.04 (sssd 1.13.4-1ubuntu1.1), Ubuntu 16.10 (sssd 1.13.4-3) and Fedora 24 (sssd-1.13.4-3.fc24). All exhibit the same problems. I've also tried "ldap_group_nesting_level = 1" without seeing any noticeable improvement with respect to performance. Putting the database on /tmp isn't viable as these are workstations that will reboot semi-frequently, and I don't believe this is an I/O bound performance issue anyways. Thanks for your time.

6 29

Enumerate users from external group from AD trust
by Bolke de Bruin 29 Nov '19

29 Nov '19

Hello, I have sssd 1.13.00 working against FreeIPA 4.2 domain. This domain has a trust relationship with a active directory domain. One of the systems we are using requires to enumerate all users in groups by (unfortunate) design (Apache Ranger). This is done by using “getent group”. During this enumeration the full user list for a group that has a nested external member group* is not always returned so we thought to add “getent group mygroup” in order to get more details. Unfortunately this does not seem to work consistently: sometimes this gives information sometimes it does not: [root@master centos]# getent group ad_users ad_users:*:1950000004: [root@master centos]# id bolke(a)ad.local UID=1796201107(bolke(a)ad.local) GID=1796201107(bolke(a)ad.local) groepen=1796201107(bolke(a)ad.local),1796200513(domain users@ad.local),1796201108(test@ad.local) [root@master centos]# getent group ad_users ad_users:*:1950000004:bolke@ad.local <mailto:bolke@ad.local> If I clear the cache (sss_cache -E) the entry is gone again: [root@master centos]# getent group ad_users ad_users:*:1950000004: My question is how do I get sssd to enumerate *all users* in a group consistently? Thanks! Bolke * https://docs.fedoraproject.org/en-US/Fedora/18/html/FreeIPA_Guide/trust-gro…

3 15

SSSD for one-way trusted AD domain
by Ondrej Valousek 15 May '18

15 May '18

Hi List, Question, we have joined machine into AD domain B. This domain has one way trust to domain A. No direct connection from domain B network to DCs in domain A is possible. Can we use SSSD to authenticate members in domain A. In windows, this works - but can't get it working in Linux via SSSD (Fedora 25, used realmd for AD join). Thanks, Ondrej ----- The information contained in this e-mail and in any attachments is confidential and is designated solely for the attention of the intended recipient(s). If you are not an intended recipient, you must not use, disclose, copy, distribute or retain this e-mail or any part thereof. If you have received this e-mail in error, please notify the sender by return e-mail and delete all copies of this e-mail from your computer system(s). Please direct any additional queries to: communications(a)s3group.com. Thank You. Silicon and Software Systems Limited (S3 Group). Registered in Ireland no. 378073. Registered Office: South County Business Park, Leopardstown, Dublin 18.

3 2

id -G user only showing primary group
by Jeff Sadowski 17 Nov '17

17 Nov '17

I'm running Fedora 26 sssd --version 1.15.3 I am authentication against an Active Directory Domain that has posix extensions enabled. All my ubuntu and centos machines are using power broker or winbind to authenticate to the domain. I want to transition away from power broker. I tried using winbind to connect fedora but I end up with issues of it not using posix extensions from my active directory. So I tried sssd out and see that users show correctly when I run the command getent passwd <username> when using winbind I had to use template for the shell and home directories which I did not like. This is not happening on my ubuntu or centos servers with the same config. There config if it helps is as follows [global] security = ads realm = MIND.UNM.EDU workgroup = MIND idmap config * : backend = tdb idmap config * : range = 2000-7999 idmap config MIND:backend = ad idmap config MIND:schema_mode = rfc2307 idmap config MIND:range = 8000-9999999 winbind nss info = rfc2307 winbind use default domain = yes # so that the users show up in getent winbind enum users = yes # so that the groups show up in getent winbind enum groups = yes restrict anonymous = 2 #added the following 2 for the Badlock updates that change the defaults #to no longer work with my domain controllers ldap server require strong auth = no client ldap sasl wrapping = plain Since that wasn't working, I uninstalled winbind and reinstalled sssd (I had removed it while testing samba since I know they can interfere.) I used realm to leave and rejoin the domain It looks like realm rewrote my smb.conf file as such [global] security = user idmap config * : backend = tdb idmap config * : range = 2000-7999 idmap config MIND:backend = ad idmap config MIND:schema_mode = rfc2307 idmap config MIND:range = 8000-9999999 winbind nss info = rfc2307 winbind use default domain = yes # so that the users show up in getent winbind enum users = yes # so that the groups show up in getent winbind enum groups = yes restrict anonymous = 2 #added the following 2 for the Badlock updates that change the defaults #to no longer work with my domain controllers ldap server require strong auth = no client ldap sasl wrapping = plain template homedir=/na/homes/%U template shell=/bin/bash My sssd.conf file looks like so [sssd] domains = mind.unm.edu config_file_version = 2 services = nss, pam [domain/mind.unm.edu] ad_domain = mind.unm.edu krb5_realm = MIND.UNM.EDU realmd_tags = manages-system joined-with-adcli cache_credentials = True id_provider = ad krb5_store_password_if_offline = True default_shell = /bin/bash #ldap_id_mapping = True ldap_id_mapping = False #use_fully_qualified_names = True use_fully_qualified_names = False fallback_homedir = /home/%u@%d access_provider = ad # debug = 3 I learned with ldap_id_mapping = True I was getting funny uid's and that interfered with my isilon that is using rfc2307 to our domain. And I want to login with <username> not <domain>\\<username> so i set use_fully_qualified_names = False While reading this https://docs.pagure.org/SSSD.sssd/users/troubleshooting.html under sections: Common AD provider issues->A group my user is a member of doesn’t display in the id output In case the group is not present in the id -G output at all, there is something up with the initgroups part. This is the case but I'm not really sure where to go from here. I set debug on the domain to 3 and my /var/log/sssd/sssd_<domainname> looks as follows when I run id -G <user> in this case the user is jsadowski id -G <username> is only showing the primary group for any user I have tried. ... (Tue Oct 31 09:16:10 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:17:11 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:17:39 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:17:39 2017) [sssd[be[mind.unm.edu]]] [get_access_filter] (0x0010): Warning: LDAP access rule 'filter' is set, but no ldap_access_filter configured. All domain users will be denied access. (Tue Oct 31 09:18:16 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:21:03 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [krb5_init_kdc] (0x0010): Missing krb5_realm option! (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [dp_module_run_constructor] (0x0010): Module [krb5] constructor failed [22]: Invalid argument (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [dp_target_init] (0x0010): Unable to load module krb5 (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [be_process_init] (0x0010): Unable to setup data provider [1432158209]: Internal Error (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [main] (0x0010): Could not initialize backend [1432158209] (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [krb5_init_kdc] (0x0010): Missing krb5_realm option! (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [dp_module_run_constructor] (0x0010): Module [krb5] constructor failed [22]: Invalid argument (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [dp_target_init] (0x0010): Unable to load module krb5 (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [be_process_init] (0x0010): Unable to setup data provider [1432158209]: Internal Error (Tue Oct 31 09:21:54 2017) [sssd[be[mind.unm.edu]]] [main] (0x0010): Could not initialize backend [1432158209] (Tue Oct 31 09:21:56 2017) [sssd[be[mind.unm.edu]]] [krb5_init_kdc] (0x0010): Missing krb5_realm option! (Tue Oct 31 09:21:56 2017) [sssd[be[mind.unm.edu]]] [dp_module_run_constructor] (0x0010): Module [krb5] constructor failed [22]: Invalid argument (Tue Oct 31 09:21:56 2017) [sssd[be[mind.unm.edu]]] [dp_target_init] (0x0010): Unable to load module krb5 (Tue Oct 31 09:21:56 2017) [sssd[be[mind.unm.edu]]] [be_process_init] (0x0010): Unable to setup data provider [1432158209]: Internal Error (Tue Oct 31 09:21:56 2017) [sssd[be[mind.unm.edu]]] [main] (0x0010): Could not initialize backend [1432158209] (Tue Oct 31 09:22:00 2017) [sssd[be[mind.unm.edu]]] [krb5_init_kdc] (0x0010): Missing krb5_realm option! (Tue Oct 31 09:22:00 2017) [sssd[be[mind.unm.edu]]] [dp_module_run_constructor] (0x0010): Module [krb5] constructor failed [22]: Invalid argument (Tue Oct 31 09:22:00 2017) [sssd[be[mind.unm.edu]]] [dp_target_init] (0x0010): Unable to load module krb5 (Tue Oct 31 09:22:00 2017) [sssd[be[mind.unm.edu]]] [be_process_init] (0x0010): Unable to setup data provider [1432158209]: Internal Error (Tue Oct 31 09:22:00 2017) [sssd[be[mind.unm.edu]]] [main] (0x0010): Could not initialize backend [1432158209] (Tue Oct 31 09:23:45 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:26:03 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children (Tue Oct 31 09:36:00 2017) [sssd[be[mind.unm.edu]]] [orderly_shutdown] (0x0010): SIGTERM: killing children ... (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [ad_sasl_log] (0x0040): SASL: GSSAPI Error: Unspecified GSS failure. Minor code may provide more information (Server not found in Kerberos database) (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [sasl_bind_send] (0x0020): ldap_sasl_bind failed (-2)[Local error] (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [sasl_bind_send] (0x0080): Extended failure message: [SASL(-1): generic failure: GSSAPI Error: Unspecified GSS failure. Minor code may provide more information (Server not found in Kerberos database)] (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [sdap_cli_connect_recv] (0x0040): Unable to establish connection [1432158226]: Authentication Failed (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [be_run_online_cb] (0x0080): Going online. Running callbacks. (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [be_ptask_enable] (0x0080): Task [Subdomains Refresh]: already enabled (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [be_ptask_enable] (0x0080): Task [SUDO Smart Refresh]: already enabled (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [be_ptask_enable] (0x0080): Task [SUDO Full Refresh]: already enabled (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [be_ptask_enable] (0x0080): Task [AD machine account password renewal]: already enabled (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [resolv_gethostbyname_done] (0x0040): querying hosts database failed [5]: Input/output error (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [nsupdate_get_addrs_done] (0x0040): Could not resolve address for this machine, error [5]: Input/output error, resolver returned: [11]: Could not contact DNS servers (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [nsupdate_get_addrs_done] (0x0040): nsupdate_get_addrs_done failed: [5]: [Input/output error] (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [sdap_dyndns_dns_addrs_done] (0x0040): Could not receive list of current addresses [5]: Input/output error (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [ad_dyndns_sdap_update_done] (0x0040): Dynamic DNS update failed [5]: Input/output error (Tue Oct 31 10:16:44 2017) [sssd[be[mind.unm.edu]]] [ad_dyndns_nsupdate_done] (0x0040): Updating DNS entry failed [5]: Input/output error (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [ad_sasl_log] (0x0040): SASL: GSSAPI Error: Unspecified GSS failure. Minor code may provide more information (Server not found in Kerberos database) (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sasl_bind_send] (0x0020): ldap_sasl_bind failed (-2)[Local error] (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sasl_bind_send] (0x0080): Extended failure message: [SASL(-1): generic failure: GSSAPI Error: Unspecified GSS failure. Minor code may provide more information (Server not found in Kerberos database)] (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sdap_cli_connect_recv] (0x0040): Unable to establish connection [1432158226]: Authentication Failed (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sdap_ad_tokengroups_get_posix_members] (0x0080): Domain not found for SID S-1-5-32-545 (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sdap_ad_tokengroups_get_posix_members] (0x0080): Domain not found for SID S-1-5-32-544 (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sdap_ad_tokengroups_get_posix_members] (0x0080): Domain not found for SID S-1-5-32-555 (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sdap_ad_tokengroups_get_posix_members] (0x0080): Domain not found for SID S-1-5-32-551 (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sysdb_mod_group_member] (0x0080): ldb_modify failed: [No such attribute](16)[attribute 'member': no matching attribute value while deleting attribute on 'name=Administrators(a)mind.unm.edu,cn=groups,cn=mind.unm.edu,cn=sysdb'] (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sysdb_error_to_errno] (0x0020): LDB returned unexpected error: [No such attribute] (Tue Oct 31 10:16:51 2017) [sssd[be[mind.unm.edu]]] [sysdb_update_members_ex] (0x0020): Could not remove member [jsadowski(a)mind.unm.edu] from group [name=Administrators(a)mind.unm.edu,cn=groups,cn=mind.unm.edu,cn=sysdb] Skipping (Tue Oct 31 10:16:54 2017) [sssd[be[mind.unm.edu]]] [sdap_sudo_load_sudoers_done] (0x0040): Received 0 sudo rules

2 1

what are the causes of Port status of port 389 for server is 'not working'
by Jeremy Monnet 17 Nov '17

17 Nov '17

Hi, I have that error message that I do not understand, because I have 2 ubuntu servers setup the same way (but 1 ubuntu 14.04 and 1 ubuntu 16.04). Ubuntu 14 is working fine, I can authenticate and sudo just fine, Ubuntu 16 can list users and groups but I cannot authenticate nor sudo. And I see in the sssd_domain.log : (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [fo_resolve_service_send] (0x0100): Trying to resolve service 'AD' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [get_server_status] (0x1000): Status of server '<servername>' is 'name resolved' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [get_port_status] (0x1000): Port status of port 389 for server '<servername>' is 'not working' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [get_server_status] (0x1000): Status of server '<servername2>' is 'name resolved' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [get_port_status] (0x1000): Port status of port 389 for server '<servername2>' is 'not working' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [fo_resolve_service_send] (0x0020): No available servers for service 'AD' (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [be_resolve_server_done] (0x1000): Server resolution failed: 5 (Fri Oct 20 16:27:29 2017) [sssd[be[domain]]] [sdap_id_op_connect_done] (0x0020): Failed to connect, going offline (5 [Input/output error]) Of course, port 389 is indeed reachable, and I have joined and re-joined the domain several times, deleted the object computer in AD, checked several times that the keytab was created, and that I could kinit with it... One thing is that I join a child AD domain and tries to login with an account from the main domain, that is probably an issue, but as that work on the other Ubuntu with the same setup, I am stuck... Thanks, Jeremy

2 8

AD auth with multiple domains
by Jeremy Monnet 17 Nov '17

17 Nov '17

Hi, I am trying to setup an authentication against Active Directory, with multiple domains, and I haven't been able to find the recommended way to do it (it is very possible I missed it...), so I am looking for explanation and advice. With a master domain example.com, and subdomains sub1.example.com, sub2.example.com, etc, how would you setup sssd (and the linux system) to authenticate the users from all the domains ? To give te example, my user is ad admin across all the forests ( my_user(a)example.com) and I want to authenticate on all the servers, smtp.example.com or proxy.sub1.example.com, etc. I also want on some computer to authenticate customer's account (my_customer(a)sub1.example.com) For now, I have 2 different setups : - on computers from example.com [sssd] config_file_version = 2 debug_level =0 domains = example.com services = nss, pam [domain/example.com] enumerate = true dns_discovery_domain = cy2._sites.example.com debug_level = 8 id_provider = ad access_provider = ad ldap_id_mapping = false #dyndns_update = false - on computer from sub1.example.com [sssd] config_file_version = 2 debug_level =0 domains = sub1.example.com,example.com services = nss, pam [domain/example.com] enumerate = true dns_discovery_domain = cy2._sites.example.com debug_level = 9 id_provider = ad access_provider = ad ldap_id_mapping = false [domain/sub1.example.com] enumerate = true dns_discovery_domain = cy2._sites.sub1.example.com debug_level = 7 id_provider = ad access_provider = ad ldap_id_mapping = false I join computer to example.com or to sub1.example.com: adcli join example.com -U my_user(a)EXAMPLE.COM or adcli join sub1.example.com -U my_user(a)EXAMPLE.COM as I would do with an ordinary windows workstation. And for AD, I use the posix attributes (and that may be the way...) so if a UID or GID exists in both domains, I happen to find wrong group names, etc. I hope my questions are clear enough ! :-) What am I doing wrong ? What are the recommended settings for that situation ? Thanks, Jeremy

2 2

Re: [Freeipa-interest] Announcing SSSD 1.16.0
by Jakub Hrozek 09 Nov '17

09 Nov '17

On Mon, Oct 23, 2017 at 08:46:08PM +0200, Michael Ströder wrote: > HI! > > Has anything changed with building the man pages? > > I'm asking because I now get formatting markup in the output of man (see > below). No, not that I'm aware of. You render the man pages locally, right, because the tarball only contains the XML sources? > > Ciao, Michael. > > SSSD-LDAP(5) > File Formats and Conventions > SSSD-LDAP(5) > > .SH "NAME" sssd-ldap - SSSD LDAP provider > > .SH "DESCRIPTION" > > .PP This manual page describes the configuration of LDAP domains > for sssd(8). Refer to the “FILE FORMAT” section of the sssd.conf(5) > manual page for detailed syntax information. > > .PP You can configure SSSD to use more than one LDAP domain. >

3 5

sssd with OTP does not work in all cases.
by Asif Iqbal 03 Nov '17

03 Nov '17

With pam_securid.so I can on /etc/pam.d/sshd auth sufficient pam_securid.so and at ssh login, I just put PIN at Password: prompt and then I get Enter SMS Token: prompt and I can then put the tokencode and I can ssh into the server fine. If I do the same with pam_sss.so it keeps asking for Password: and never changes the prompt to Enter SMS Token: and ssh fails badly. At this second Password: prompt I tried with just tokencode (at 18:45:34 in log below) or PIN and tokencode (at 18:47:55). Neither let me in and failed eventually. I think it is because pam_sss -> proxy -> securid -> pam_securd is failing to handle PAM conversation? Is there a way to fix that to so pam_sss to behave the right way and let authenticate in two steps with PIN and then TokenCode on next step? Also without this PAM conversation, when the PIN expires it will not let you update it. With simple pam.d/sshd and auth sufficient pam_securid.so that works very well as well. I have sssd.conf setup like this auth_server = proxy proxy_target_pam = securid And in pam.d/securid file auth sufficient pam_securid.so Here are some log http://dpaste.com/2HD27XH.txt where I tried with PIN at first Password: prompt and then TokenCode at second Password: prompt at 18:45:34 and failed to login And I tried with PIN at first Password: prompt and then PIN and TokenCode at second Password: prompt at 18:47:55 and failed to login I tried with SElinux off and on and same result If I put PIN and TokenCode at the first Password: prompt, login works fine . I did not put any log for that here. Any suggestion how to fix pam_sss for OTP? Thanks! -- Asif Iqbal PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing?

2 7

loss of id / i have no name!
by Thomas Beaudry 25 Oct '17

25 Oct '17

Hi, I have repeated issues with users losing their usernames (only being mapped to their uid / in the terminal it says "i have no name!@host"). It doesn't happen daily, but it is extremely frustrating because they are running scientific pipelines that take a few hours to several days to complete, and as soon as their name is lost, it fails and the pipeline has to start from scratch. My setup is as follows. Client: Ubuntu 16.04 (Note that my university has licenses for Redhat, I could upgrade to it if it will 100% fix my problem. I simply use Ubuntu since a lot of scientific packages are already tailored for it, and it saves me weeks of work). Server: Windows AD, with a Windows NFS file server. What i don't understand is that if a user is successfully able to authenticate, why isn't the account cached, and used for their entire session? How can a name be lost if it is cached. I have the following in my sssd.conf: cache_credentials = True krb5_store_password_if_offline = True I have had this issue for quite awhile, so upon a previous sssd users suggestion, i disabled reverse DNS and it seemed to make this occur less often, but as far as I can tell my DNS is setup properly. I can do a `nslookup <host>` and get the proper ip address, and vice versa. Any help would be greatly appreciated! Thomas

2 7

idmap_sss Backend for Winbind
by rdratlos＠yahoo.co.uk 25 Oct '17

25 Oct '17

Dear all, I would like to use SSSD's dmap_sss backend (1.15.3) for winbindd (Version 4.6.7) to let SSSD map UIDs/GIDs and SIDs on a file server in an samba based AD environment. I've followed the limited instructions of the man page but from the logs it seems that winbindd does directly communicate with the AD server. The major settings in smb.conf are: [global] workgroup = MYDOMAIN realm = MYDOMAIN.COM security = ads ... winbind use default domain = yes winbind nss info = rfc2307 # Default idmap config for local BUILTIN accounts and groups idmap config * : range = 10000-19999 # idmap config for MYDOMAIN idmap config MYDOMAIN:backend = sss idmap config MYDOMAIN:schema_mode = rfc2307 idmap config MYDOMAIN:range = 500-9999 What's wrong here? Could someone please provide me with a working example?

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sssd-users October 2017