General :: Openssh + PAM + LDAP Fails Only With LDAP Users?
Mar 31, 2010
I've compiled openssh-5.4p1 on RHEL 4.8 with Openssl 0.9.8m + pam It works perfect without pam (pam-0.77-66), both with password and public key auth. Whith pam enabled and LDAP (openldap-2.4.21, from scratch) something strange happens: system users: I can do ssh with both password and public key LDAP users: public key works for remote users, still I cannot do ssh with just password. I'm trying a custom PAM configuration, because the default one (even with authconfig + LDAP ) blocks ssh even with system users.
My pam SSHD configuration is:
#%PAM-1.0
auth required pam_env.so
auth sufficient pam_unix.so likeauth nullok
auth sufficient pam_ldap.so use_first_pass
[code]....
My LDAP users are ok: i can do "su - " remote LDAP (so that nss_ldap is OK), also getent passwd and getent group is ok.
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May 25, 2011
I am using RackMonkey to map out my lab. Unfortunately, due to RM limitations, every user who accesses the site has write access UNLESS they are logged in as a user named "guest". I currently have Apache allowing only the users (sysadmins) in an LDAP group access to RM, but I would like to allow read-only access for other users as well.I found mod_authn_anon, but I am having trouble combining the two authentication methods. I am using Apache 2.2.18 (compiled myself) on SLES 11.1.
This is the common part:
Code:
AuthType Basic
AuthBasicProvider ldap anon
Order allow,deny
Allow from all
This part by itself works for the LDAP authentication:
Code:
AuthName "System Admins"
AuthLDAPURL "ldaps://example.com/ou=ldap,o=example.com?mail" SSL
Require ldap-group cn=SysAdmins,ou=memberlist,ou=groups,o=example.com
This part works by itself for guest access:
Code:
Anonymous guest
Anonymous_VerifyEmail Off
Anonymous_MustGiveEmail Off
Anonymous_LogEmail on
Require valid-user
But if I have both of the previous blocks enabled at once, then guest access does not work. If I throw in a "Satisfy any", then I am not prompted for a username at all. How can I allow access to this LDAP group and to a user named "guest", but not allow all valid LDAP users to log in?
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Sep 28, 2010
Just installed openldap server on a VM CentOS called 'ldapsrv', it works fine, ldapsearch returns all ldap information.
Installed openldap client on another VM CentOS called 'ldapclient1', configured it with most basic configuration, no ssl/tls etc. but ldapsearch returns error:
ldapsrv is pingable:
Some outputs:
PHP Code:
PHP Code:
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Jun 5, 2011
In the past I found some great help on this forum, so here goes. Bare with me because it's a long story. I'll try to be as complete as possible. I've installed and configured OpenLdap on a virtual machine with ip 192.168.39.134. I've added 2 users via LAM. In the ou WikiUsers and the domain is wiki.local.
I've then created another host with ip 192.168.39.133 with mediawiki installed on it. Then I added the extension LDAPAuthenthication. In the LdapAuthentication file I added this code (only the last paragraph is mine, I added the others to show it's location in the script):
Quote:
$path = array( $IP, "$IP/includes", "$IP/languages" );
set_include_path( implode( PATH_SEPARATOR, $path ) . PATH_SEPARATOR . get_include_path() );
[code]...
I know I'm close because I can't register any new users or accounts on the mediawiki site. Although I could before I added the LDAP service. This is indeed all just to test and get to know how LDAP works. That's why it's all virtual in VMWare. I did not really configure anything on the LDAP, i just installed it and chose a domain (wiki.local).
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Feb 16, 2010
I'm using Sun One LDAP server, (Soon to be moving to openldap). I have one Master server, no slaves, about 60 user accounts.
I'd like to add an attribute to each of the users DN's to restrict there ability to login to specific hostnames. I.e. I have hosts A, B and C. Dev staff can access A and B, but not C, and support staff need to access all of them.
I found a link at [url] which talked about using 'hostsallowedlogin' and 'hostsdeniedlogin' attributes but I'm presuming these are bespoke. If they are, how do you configure the ldap.conf to take note of these attributes when authorizing access?
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Sep 26, 2010
I have configured ldap on Debian5 and samba on another machine, all servers are running ok, but when i try to add users, it gives me an errror that "unknown user"
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Aug 8, 2011
Running RHEL 5.4 on a HP server. Ran into a issue today where ldap was working fine then was informed it was failing. During the troubleshooting process, I found out that the ldap service failed to start up. See error below:
/sbin/runuser: /usr/sbin/slaptest: Permission denied
I checked the permissions of the ldap.conf and slapd.conf files and they appeared to be correct. Any ideas why ldap will not start up?
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Aug 7, 2010
I would like to ask:How do I setup LDAP auth of users/groups on Debian 5.0?Is it using LDAP Migration tools? Can be done differently? Using different tool? Some nice tootorial?Some up to date book for LDAP or I need to dig in openldap.org?I'm learning by book which is a lil bit older so Im bit confused.
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Mar 13, 2010
i have configured ldapserver on rhel4 for creating address book
following are configuration files on ldap server
/etc/openldap/slapd.conf
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/nis.schema
i am able to import this ldif file into database.also when i perform the ldapsearch on this server with command"ldapsearch �x �W �D �cn=manager, dc=example, dc =com� �b �dc=example, dc=com�" i get correct output.
but when i am trying to search from another client machine, i am getting "error ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)"
also when i configured address book on mozilla on server., it is working fine.but not working on another machine.is any configuration is missing on client machine.both ldap server and client are configured on rhel4es without any firewall or selinux.
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Jul 2, 2010
I took to yast to install ldap. I creating the CA cert, server key and server cert and specified them during the yast ldap server dialogs.
The firewall is open for ldap.
I also went through yast's ldap client ... though I didn't exactly see to anything (presuably it wrote up a configuration file somewhere).
However when trying use the basic ldap tools, like ldapwhoami. Well it doesn't connect and gives me the above error. Of coure the ldap db is unpopulated as yet, so it probably is not able to say who am at all. But ldapadd doesn't work either.
It seems to point to my SSL usage not being correct .. so I'm trying to double check that now.
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Apr 5, 2010
i have successful secure ldap replication but i could not make ldap client to direct its authentication to slave ldap
here is my config file on ldap client (i am not sure if it is the right place though)
ip : 192.168.1.183 is master ldap
ip : 192.168.1.185 is slave ldap
pico /etc/ldap/ldap.conf
#
# LDAP Defaults
code....
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Sep 8, 2009
I installed CentOS 5.2 and then run yum update. I configured this server as LDAP/Samba primary domain controller. LDAP seems to be OK and for testing I am able to create users with:smbldap-tools useradd -am usernameI can ssh into the server as root and also as a Linux user which was locally created in the server. But ssh into the server as LDAP user fails (from a Fedora 11 machine) with "Permission denied, please try again", prompting again for password.Some data:
# rpm -qa | grep ldap
python-ldap-2.2.0-2.1
php-ldap-5.1.6-23.2.el5_3
[code]....
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May 31, 2010
I'm trying to set up a Linux server and I am new to this. I have gone through most of the configuration using SAMBA 3.0 and when I populate the ldap directory all I get this error before the password request:
Then when I perform an ldapsearch to see if the directory is populated I get this message:
I'm positive all my .conf files are done right.
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Nov 28, 2008
I'm checking with a sniffer and there's activity going on between the client and the LDAP server... as a matter of fact, the sniffer shows that the search is producing one ldap item, however, php says it can't contact the ldap server (after it has bound and everything):
The script is working beautifully on another host with debian.
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Aug 9, 2010
why i can't login on the ldap-client via ldap, so here is a short description of my machines (i use openvz virtualising)I have on the HN (Debian Lenny) 2 VE's, which are in the same subnet (192.168.1.0/24)The first VE (Hostname: ldap1, IP: 192.168.1.91) is the ldap-server, which is so configured, that i can manage the server via phpldapadmin.The second VE (Hostname: ftp1, IP: 192.168.1.31) is the ldap-client, there should run a sftp-server in the future and the sftp-server(ssh-server) should use ldap-usernames to login. on the ftp1, i get with this command getent passwd the users configured on the ldap-server, but with the command id USERNAME the result is, that the user doesn't exist. (USERNAME is this name, i get returned by getent) and if i try to login via ssh, i get permission denied. and because the machines are openvz-virtual-machines, so i can't login on them like on a normal system, but a su USERNAME doesn't work too, because the user is not known on the system.
my installation:
i don't think, that the ldap-server is the problem, because the phpldapadmin and getent on ftp1 are working perfectly, but if you want, i can post the config here too. the VE ftp1 was configured with the following how-to: [URL] and pam is configured like in the chapter "PAM setup with pam_ldap" on [URL]
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Dec 2, 2010
I've setup an Ubuntu 10.10 LDAP Client to authenticate off my LDAP server. I've install the following: sudo apt-get install libpam-ldap libnss-ldap nss-updatedb libnss-db nscd ldap-utils pam_ccreds Here's my /etc/nsswitch.conf: passwd: files ldap [NOTFOUND=return] db group: files ldap [NOTFOUND=return] db
[Code]...
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Oct 21, 2010
I have LDAP authentication working via SSSD using authconfig-tui and a few minor modifications to sssd.conf (ie: max_id etc). The problem I am having is it would appear /etc/ldap.conf is being ignored and/or setups that work perfectly on RHEL5, F11 and F12 no longer work on F13. Specifically Im referring to "pam_check_host_attr" and "nss_map_attribute". It refuses to honor either of these options and I can only assume a number of the other options in our ldap.conf. For instance, "nss_map_attribute" is defaulting to the standard "homeDirectory" rather than "homeDirectoryLinux". This is related to a bunch of OSX clients we have and its not optional to use another setup. The host restriction is also a major issue.
Relevant sssd.conf:
[domain/default]
auth_provider = ldap
cache_credentials = True
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Jul 13, 2010
can anyone tell me what is the difference between these two files of LDAP client /etc/ldap.conf and /etc/ldap/ldap.conf and for what purposes these two files gives services. Is it necessary to have these two files at a time ?
I use these files to install LDAP client to authenticate with our LDAP server by creating a symbolic link of /etc/ldap.conf to /etc/ldap/ldap.conf.
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Jan 18, 2010
how to add users to groups with ldap? Further, could someone point me towards some good command-line management tools? Creating each dn manually is going to get old real fast...
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Apr 16, 2010
Now I have my ldap server doing authentication and providing autofs maps perfectly the next question ... is there a utility anywhere that will allow me to stuff 1200 users into the ldap server from a csv file
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Jun 14, 2010
I have an Openldap server and many 9.10 servers using it to check for possible ssh users. No problems there. Just brought up my first 10.04 server and went through the same procedure to allow ldap users to ssh in, works great. The problem is that ldap users cannot su to root on the 10.04 server. Only locally defined users can su to root, though they cannot su to ldap users. The local root user can su to anyone. Quick overview of how I installed ldap login:
Code:
# apt-get install libnss-ldap
# echo "session required pam_mkhomedir.so skel=/etc/skel/" >> /etc/pam.d/common-session
And added ldap to the end of these lines in /etc/nsswitch.conf:
Code:
passwd: compat ldap
group: compat ldap
shadow: compat ldap
This process has worked without a hitch on 9.10 dozens of times. So my question is, why are ldap and local users now incapable of using su across authentication mechanisms? For reference these are the error messages in /var/log/auth.log when trying to su to root from an ldap user:
Code:
Jun 14 16:17:07 server unix_chkpwd[6560]: check pass; user unknownJun 14 16:17:07 server unix_chkpwd[6560]: password check failed for user (root)
Jun 14 16:17:07 server su[6559]: pam_unix(su:auth): authentication failure; logname=ldapuser uid=2000 euid=2000 tty=/dev/pts/5 ruser=ldapuser rhost= user=root
Jun 14 16:17:09 server su[6559]: pam_authenticate: Authentication failure
Jun 14 16:17:09 server su[6559]: FAILED su for root by ldapuser
And the auth.log for trying to su to an ldap user from a local one:
Code:
Jun 14 17:18:18 server su[8473]: pam_unix(su:auth): authentication failure; logname=localuser uid=1000 euid=1000 tty=/dev/pts/0 ruser=localuser rhost= user=ldapuser
Jun 14 17:18:18 server su[8473]: Successful su for ldapuser by localuserJun 14 17:18:18 server su[8473]: + /dev/pts/0 localuser:ldapuser
Jun 14 17:18:18 server su[8473]: bad group ID `2000' for user `ldapuser': Operation not permitted
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Oct 5, 2010
"Merging" may not be quite the right word but that is the desired end result.
Scenario: many Solaris 10 servers, each with various local users. We want to set up LDAP for all for all of them. LDAP server is set up, procedure for getting other servers to use it for user authentication is documented and tested. The question is how to handle users that are in LDAP who also exist as a local user on a given machine.
It appears that the usernames on both sides follow a convention and therefore match but obviously the userids will not match. Local user joe has userid 1234, LDAP user joe has userid 56789.
The way I see it we'll have to:
1. move local user joe's home directory to the path that LDAP user joe will want
2. change local user joe's userid to that of LDAP user joe
3. change joe's files' owner to his new userid
4. remove local user joe
5. finally configure LDAP
Is this a rational procedure? Is there a more effective method? I'm not looking forward to this as there are many servers and each of them have a different set of local users, each with different userids which will have to be handled manually and individually therefore not even scriptable much.
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Mar 16, 2009
I did useradd -g users ldaptest and tried logging in remotely but the client always says no such user. what do I have to do to update the users that LDAP sees?
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Sep 16, 2010
One I cant figure out is a problem of authentication. I'm using open ldap server and try to authenticate a groupware (simple groupware) against it. As it fails, I tested with a ldap client to understand things better. Using GQ ldap client, I 'm able to browse my ldap tree successfully and to search some args from the base DN i specified. but when entering the exact uid as a search string iI got no answer whereas searching the cn returns the correct entry (and display its related entry including the uid I can't find ..) Here is the only thing I can trace in logs (syslog) when trying to seach firstname.lastname (= uid)
[Code]....
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May 23, 2011
I had a machine that is using ldap, but need to remove it completely.I edited the /etc/nsswitch.conf and removed all references of ldapand renamed /etc/ldap.conf to /etc/ldap.conf.bakI can log in as root, but cannot log in as any user in /etc/passwdIn the /var/log it shows pam_ldap: missing file "/etc/ldap.conf"I am guessing I am missing something else?I never set this machine up for ldap, was here when i got here, so not sure of steps to even put ldap on.
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Apr 11, 2011
I am switching to Gnome because its look and feel is closer to Windows for my workgroup. LDAP and NFS are working fine with KDE and SSH. but I cant login with LDAP users both directly or via NX client. When logging in directly on the server it shows this error:
Code:
"Xsession: Login for <user> is disabled "
When logging via NX client it says, it authenticated successfully and then quited with this popup message:
Code:
Could not connect to session bus: Failed to connect to socket /tmp/dbus-0frstajyNE: Connection refused
I closed this popup window and one more appeared:
Code:
Could not acquire name on session bus
[Code]....
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Jan 16, 2010
I installed ldap on my server and one of my client machines yesterday.It also now won't let me get into graphical utilities that require root privileges; synaptic for example. It comes back with "incorrect password". I noticed that in the terminal it now requires me to enter two passwords to become root: the root password and the ldap password. I wonder if the two are related.I'm not sure what information to post; there's a ton of configuration files associated with this setup. Can somebody help me troubleshoot this? Thanks!
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Jan 22, 2010
I currently have an LDAP database on my Suse 10.2 server for managing authentication and controlling emails for my Cyrus email server. I use this setup to provide email functionality to my web and email hosting clients, as well as DNS functionality, and it uses the default LDAP database that was setup when OpenLDAP was initially configured. Email support is working wonderfully, I might add. I also tested and verified the use of an email lookup directory in two different email clients (Outlook and Evolution) so that I can tell one of my clients how to lookup the email address of users who are setup in the LDAP server, and it works beautifully.
However, I'd also like to be able to allow my clients to build a shared contact database that can also be used in their email clients so that they can share them among all of their users. Ideally, I would need to be able to allow each client to have their own database of shared contacts, and I assume this would be done by creating a new LDAP database for each client company (i.e. group of users) that can contain the list of shared contacts for any of that client's users. When they configure their email client directory settings, they would enter the base path to their database in order to retrieve their shared contact database entries.
In my web searches, I've found plenty of CRM solutions on the web that claim to provide this type of functionality, but I believe that OpenLDAP contains everything I need to make this work without adding another layer of software to the server solution. (I subscribe to the "Keep it Simple, Stupid!" approach whenever possible.) Essentially, I need to have People entries in a client's LDAP database that are NOT email users on the system. The fields in the standard people schema are all the fields they would need - as long as I can figure out how best to add these non-user entries in the LDAP database. Are there any potential difficulties in creating additional LDAP databases expressly for this purpose?
Are there any tricks to adding contact entries into a client's LDAP database without them also being current email users on the server, so that those entries can be retrieved through an Email Client directory lookup? I will also want to provide an easy method for my client users to add new entries to their LDAP contact database, most likely through a web interface for them that could then issue LDAP commands on the server based on the input fields for the new contact. (I don't believe this is possible from within the email client itself.) Is there any reason this could not be done with the proper configuration? What should I be aware of as I setup this contact management web interface? Is there a better way for non-technical client users to manage this list of shared contacts?
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Mar 18, 2011
I installed and configured LDAP server and client on RHEL5 successfully. Problem is that when I add more than one user on server and clients, It shows error 'invalid user'.When I run the command:-#chown -R user:users /home/user, It shows error 'invalid user'. by step for adding and modifying more users in ldap servers.
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Feb 1, 2011
How to disable the LDAP Users automatically with the specified time duration. For this any configuration file required or else a script need to be written.
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