389-users June 2020

389-users@lists.fedoraproject.org

13 participants
19 discussions

Replication with SSLCLIENTAUTH: server sent no certificate
by Eugen Lamers 01 Feb '21

01 Feb '21

I'm trying to setup a replication with a certificate based authentication between supplier and consumer. The certificates in the certdb at /etc/dirsrv/slapd-XXX contain the very same CA with which the respective server certificates in the certdbs have been signed. The certificates all have the 'u' flag, and the CA has the C and T flag. The replication (on the supplier) has been setup such that TLS and certificate based authentication is used, see extract from the replication agreement object: objectclass: nsds5ReplicationAgreement nsds5replicahost: <consumer-hostname> nsds5replicaport: 389 nsds5replicatransportinfo: TLS nsds5replicabindmethod: SSLCLIENTAUTH Trying to initialize the consumer raises this error in the error-log of the supplier (the host sending the starttls connection request): Replication bind with EXTERNAL auth failed: LDAP error 48 (Inappropriate authentication) (missing client certificate) The certificate that the server should have sent can, however, be used with the ldap commandline tools as ldapsearch. In this case a wireshark trace clearly shows that the client sends the certificate during the TLS handshake, while in the above case it doesn't. The TLS handshake defines that the client has to send an "empty certificate" if it does not have a certificate that has been issued by a CA offered by the server during the handshake. I can't see a reason for the client to think the condition isn't met. The certificate with which the server (supplier) is setup is the only one available. Is it possible that the server does not know which certificate it has to use for authentication with the consumer server? And if so, how do I make the server know? The 389-ds in use is the version 1.4.1.6~git0.5ac5a8aad. The problem was the same with 1.4.0.3. Thanks, Eugen

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ERR - slapi_ldap_bind - Could not send bind request for id [(anon)] authentication mechanism [EXTERNAL]: error -1 (Can't contact LDAP server), system error 0 (no error), network error 0
by Graham Leggett 19 Nov '20

19 Nov '20

Hi all, We have a long standing 389ds master LDAP server that was found to be unable to contact it’s slaves. Most specifically, the slaves show nothing in their logs about any kind of connection, while the master is logging this: [12/Nov/2019:21:39:47.212715697 +0000] - ERR - slapi_ldap_bind - Could not send bind request for id [(anon)] authentication mechanism [EXTERNAL]: error -1 (Can't contact LDAP server), system error 0 (no error), network error 0 (Unknown error, host “ldap01:636”) Key is "system error 0 (no error)”, which leaves us stumped. The error is obviously “success”. Has anyone seen this kind of thing before? This is 389ds running on CentOS7 as follows: 389-ds-base-1.3.9.1-10.el7.x86_64 Regards, Graham —

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Problem browsing LDAP with Outlook
by Chris Bryant 26 Aug '20

26 Aug '20

When configuring Microsoft Outlook (not Outlook Express) to access an LDAP directory, there is an option to 'Enable Browsing (requires server support)'. If this option is chosen and the directory server supports it, then you should be able to open the LDAP address book and page up and down through the results. I have been unable to get this working properly with 389 DS. When I try to browse from Outlook against the 389 DS directory, I am able to see the first page of results perfectly. However, if I move to the next page, only the first object returned will have any attributes included, and all of the rest of the objects in the page will have no attributes. I have a test perl script that duplicates this functionality as well. I can get this to work properly with an older version of Netscape Directory Server, and I can get it working with OpenDS. Since 389 DS advertises support for the controls that are required for this to work, just like the other two servers, then I would expect it to work there also. Has anyone out there gotten this to work with 389 DS? If so, can you share if there was anything special that you needed to do to get this to work? I'm trying to determine if this is a bug in the server, or if I'm just missing something in the configuration. Thanks, Chris USA.NET You Run Your Business. We'll Run Your Email. This message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information of USA.NET, Inc. Any unauthorized review, use, copying, disclosure, or distribution is prohibited. If you are not the intended recipient, please immediately contact the sender by reply email and delete all copies of the original message.

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MemberOf group restrictions to a client system (server and client running CentOS 7)
by Janet Houser 06 Aug '20

06 Aug '20

Hi, I'm new to 389-ds and last week downloaded and installed the software. I have a running instance of the server, and I've added TLS/SSL. I've configured a CentOS 7 client to be able to query the server using TLS/SSL, and all appears working. I've created users and groups on the 389-ds server successfully. For each user and group, I've enabled posix attributes and my client can see the unix users and groups using the "getent password" or "getent group" commands. Now, here's where I'm getting tripped up.......... I need to limit which users have access to which systems. I've been trying to do this via memberOf group limitations. I found the following online resource (https://thornelabs.net/2013/01/28/aix-restrict-server-login-via-ldap-groups…) which is close enough to CentOS that the initial commands worked. I enabled the MemberOf plugin and changed the attributes per the link, and restarted the system. I created a test group (that I didn't enable a posix GID) and tried to add a single user via: Right click on group -- > click Properties --> then Members --> click Add --> Search for user --> click Add. When I try to go this route (which worked before enabling the memberOf plugin) it worked. Now it seems I get the error: "Cannot save to directory server. netscape.ldap.LDAPException: error resiult(65): Object class violation" And the messages file throws the error (/var/log/dirsrv/slapd-<instancename>/errors: "Entry "uid=test,ou=People,dc=int,dc=com" -- attribute "memberOf" not allowed [17/Feb/2016:11:22:58 -0700] memberof-plugin - memberof_postop_modify: failed to add dn (cn=testgroup,ou=Groups,dc=int,dc=com) to target. Error (65)" So it seems my server isn't quite using the memberOf plugin properly, but I'm not sure what else to enable. I'll have to solve this issue before I even try to filter login access via groups on my client system. I should mention that if I go under the advanced tab for one of the groups I created, I can add the the attribute "uniquemember", but I'm not sure what I should set the "value" to be. I've tried creating new users to see if I could set their "uniquemember" attributes, but no luck. It seems that I don't have the ability to set this attribute on individual users, only groups. This might not be the right road to head down when trying to restrict access to servers via groups, so I'm open to any suggestions. Any suggestions would be appreciated.

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Re: Failed to get the default state of cipher
by Ghiurea, Isabella 25 Jun '20

25 Jun '20

William thank you for reply, bellow is output for certl cmd for this host with error( Failed to get the default state of cipher) To deploy almost identical ldap hosts , the Sys Admin here is using Puppet but unfortunelly are always issues with rpms version mismatch and cfg , can you suggest another solution to deploy multiple ldap hosts all running same version and almost same cfg , only diff in ldap hosts is the name of DS instance aka :ldap* Here is the output s per your request: certutil -L -d /etc/dirsrv/slapd-ldap2/ Certificate Nickname Trust Attributes SSL,S/MIME,JAR/XPI n1-2.xxx.xxx.xx u,u,u XX Internal Root CA CT,, XX Internal CA CT,, Regards Isabella From: William Brown <wbrown(a)suse.de> Subject: [389-users] Re: 389-DS Failed to get the default state of cipher To: "389-users(a)lists.fedoraproject.org" <389-users(a)lists.fedoraproject.org> Message-ID: <87B2EB8A-BA13-4F9B-979E-252D5423C0C1(a)suse.de> Content-Type: text/plain; charset=utf-8 > > we have another host with same version and suppose same cfg but never > saw the error, > > [24/Jun/2020:09:22:54.687024072 -0700] - ERR - Security Initialization > - _conf_setallciphers - Failed to get the default state of cipher > (null) I'm curious - how did you make a host with the same config? Normally with 389 you need to configure both individually to look the same but you can't copy-paste config files etc. My guess here is that perhaps your nss db isn't configured properly, so I'd want to see the output of certutil -L -d /etc/dirsrv/slapd-<instance>/ on the affected host. - Sincerely, William Brown

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Provider Node Not Restarting Following Failed Schema Update
by Fong, Trevor 25 Jun '20

25 Jun '20

Hi There, We tried to dynamically a new schema dynamically using /usr/lib64/dirsrv/slapd-eldapp1/schema-reload.pl Unfortunately, (and unknown to us at the time) the objectClass definition misspelt a couple of the attribute names. The schema reload process should have picked that up and refused it, but it didn't and so proceeded to update entries using the new schema. That's when we started getting errors like the following in the error log: [19/Jun/2020:10:28:08.390882389 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.399523527 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.404890880 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.430284251 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.466371449 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.495859651 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.522007224 -0700] - ERR - libdb - BDB0151 fsync: Input/output error [19/Jun/2020:10:28:08.546930415 -0700] - ERR - libdb - BDB4519 txn_checkpoint: failed to flush the buffer cache: Input/output error [19/Jun/2020:10:28:08.569781853 -0700] - CRIT - checkpoint_threadmain - Serious Error---Failed to checkpoint database, err=5 (Input/output error) I tried restarting dirsrv and that's when it started giving errors about the unknown (misspelt) attributes in the new objectClass. I fixed those errors in the schema and restarting dirsrv. I saw the following message in the error log: NOTICE - dblayer_start - Detected Disorderly Shutdown last time Directory Server was running, recovering database. There was no further log, but the CPU utilization for ns-slapd was at 99.9% so I just let it run over night hoping that it wasn't stuck in a loop. But there was no improvement the next morning, so I ordered a RAM increase from 4 GB --> 16 GB hoping that would fix it, I let it run for a while with no indication of progress. I also tried to run db2ldif to try to dump the db to an ldif file, but got the same "recovering database" message. That's where it is now - I'll let it run for a few hours and hope it does something. Would anyone be able to offer any further advice? Is there any way to see how it's getting along with the database recovery? Is this db well and truly hosed? Unfortunately this system was spec'd for development so no backups were running so recovery from backup is not an option. Thanks, Trev

2 1

389-DS Failed to get the default state of cipher
by Ghiurea, Isabella 24 Jun '20

24 Jun '20

Our new DS env is running: 389-ds-base-libs-1.3.9.1-10.el7.x86_64 389-ds-base-1.3.9.1-10.el7.x86_64 After DS was upgrade to above version seeing this error when restarting the DS, we have another host with same version and suppose same cfg but never saw the error, please advise a fix for this issue in this version: Thank you ERR - Security Initialization - _conf_setallciphers - Failed to get the default state of cipher (null) [24/Jun/2020:09:22:54.686777541 -0700] - ERR - Security Initialization - _conf_setallciphers - Failed to get the default state of cipher (null) [24/Jun/2020:09:22:54.687024072 -0700] - ERR - Security Initialization - _conf_setallciphers - Failed to get the default state of cipher (null) [ [24/Jun/2020:09:22:54.688953359 -0700] - INFO - Security Initialization - SSL info: Enabling default cipher set. [24/Jun/2020:09:22:54.689229153 -0700] - INFO - Security Initialization - SSL info: Configured NSS Ciphers

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DNA Plugin NextValue automatically added every time for same uid
by DaV 24 Jun '20

24 Jun '20

Hi, I find the DNA Plugin NextValue attribute will automatically added every time for same uid. version: 389-ds-base-1.3.8.4-15.el7.x86_64 This is the server side configuration: > dn: cn=uidNumber,cn=Distributed Numeric Assignment Plugin,cn=plugins,cn=config > objectClass: top > objectClass: extensibleObject > cn: uidNumber > dnaType: uidNumber > dnaMagicRegen: 99999 > dnaFilter: (objectclass=posixAccount) > dnaScope: dc=example,dc=com > dnaNextValue: 5007 > dnaMaxValue: 9999 > dnaThreshold: 200 > creatorsName: cn=directory manager > modifiersName: cn=Distributed Numeric Assignment Plugin,cn=plugins,cn=config > createTimestamp: 20190822054416Z > modifyTimestamp: 20200619040000Z User attribute source is Windows AD, I have nsDSWindowsReplicationAgreement which sync posix attribute from AD to 389ds. When I fill magic number 99999 on AD side, user will get a UidNumber through DNA plugin. For example, an user get a uidNumber 5007 for the first sync, when I update user entry attribute(add telephone), this user will get a new uidNumber 5008 for the second sync. I don't know whether this is normal. Sincerely, -- DaV

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389 + sssd: Give user information about 389 server password policy
by Nicolas Martin 24 Jun '20

24 Jun '20

Hello, I enabled password complexity constraints, password history and password expiration (1 days min, 70 days max). When I use the command passwd to change a user's password, I get the error message: Password change failed. Server message: Failed to update password passwd: Authentication token is no longer valid; new one required In the following cases: Password was changed less than a days ago Password does not match complexity constraints Password is already in history My question: would it be possible to give better information to the user ? To let him know that his password is not matching constraints, already in history or changed recently ? I realize that some of this is related to sssd/pam, but I'd like to know if 389 server is at least able to tell this to sssd/pam. Thanks, Nicolas Martin

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LMDB vs BDB where locks are exhausted
by Emmanuel Kasprzyk 23 Jun '20

23 Jun '20

Hi I am working on large Directory Server topology, which is reaching very fast the amount of available locks in BDB ( cf https://bugzilla.redhat.com/show_bug.cgi?id=1831812 ) - Can the planned switch in 389-ds-base-1.4.next to LMDB help for such cases ? ( Especially after reading "The database structure is multi-versioned so readers run with no locks" on http://www.lmdb.tech/doc/index.html ) - Is the switch to lmdb planned in an amount of quartals or years? I know nobody likes to put dates on roadmaps, it's just that having a rough estimate would help me to know how much effort I should put into tuning BDB right now. Thank you -- Emmanuel Kasper Technical Account Manager Red Hat EMEA <https://www.redhat.com> <https://www.redhat.com>

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389-users June 2020