Fedora Security :: LDAP Has Stopped Being Able To Log In
Apr 21, 2009
I enabled LDAP from the system>administration>authentication and have not had any luck with it working. I now want to turn it off and log back into my machine normally.
I logged into terminal as root and told it to change the config files back to the previous ones and now it will not let me log into any of my accounts including root! this is via X, SSH and terminal.
If i boot into single user mode and change a users password this makes no different.
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Apr 13, 2011
I have a problem with my fedora workstation.I am trying to change my ldap user password through passwd command.When I first create the user on ldap server, I use md5 and create the user password.This is the entry:
Code:
dn: uid=boo,ou=People,dc=linux,dc=gettolandia,dc=org
uid: boo
[code]....
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Dec 10, 2009
I wish to setup a network that works like windows but for with lunix of course!. It will need to be able to handle security/DNS/DHCP & Document store from one location. I've been doing some reading and have found that I think I need to be using one of the following:
LDAP
NIS
Kerberos
I have looked at a few Linux based OS's. I did notice that when you install fedora live desktop it gives you the option to connect to one of the above. So I am looking for a complete solution.
1. How to setup fedora to act as server for my needs (or other Linux build)
2. Add fedora/linux mint machines to server to use new security settings. (or other linux build)
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Mar 6, 2009
I know very little about SE Linux and I've heard that in some situations it's better to disable it. For a home user, is it important? Does it improve your life ? or does it get in the way ?
Last week some update stopped my printing and I had to install the new hplip from HP because it wasn't in the Fedora repos to correct the problem. I don't know if SELinux had anything to do with it, but today when I disabled SELinux a few minutes later I get a star up on the toolbar and when I clicked on it it mentioned something about hplip. It wouldn't make any sense to me but maybe this has happened to others.
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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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Apr 21, 2011
I am integrating my Unix box to the Windows AD using PAM_LDAP and Kerberos enabled. I was wondering, since Kerberos is enabled is there any point to enable SSL on my LDAP.conf? My understanding is that since Kerberos is enabled, therefore the username/password is sent securely there isn't any benefit of enabling SSL on the LDAP.conf? It's one of or another.
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Mar 24, 2010
Please let me know:1. What LDAP logs are typically available2. How to find them3. How to Parse them
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Nov 16, 2010
I have a working LDAP-server (I belive!!) I want my laptops to authenticate against the server, when they logon. That works fine as long as the network is present. But I also want the users to be able to log on, when the network is down. When I go to a terminal (without network) I can su to another LDAP-user.I can login via graphical login-screen with the network attached, but not when it is disconnected.
In a terminal id john gives me information about the user john.
My conf. files looks like this:
/etc/ldap.conf
host 172.16.0.138:389
ldap_version 3
bind_policy soft
[Code]...
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May 28, 2010
I am unable to find any ldap.conf parameter or pam.d/system-auth setting from where i can restrict the LDAP users having uidNumber less than a particular number, say 500 to login into the system.I am using OpenLDAP server and tried pam_max_uid 500 in ldap.conf but it didn't work.
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Jan 13, 2011
I have been battling with FreeRadius with LDAP backend and Microsofts built-in supplicant. I found on some directions that the certificate you use have to have a EKU(Enhanced Key Usage) with an ODI of 1.3.6.1.5.5.7.3.1 and a Client side Cert with the same except a ODI of 1.3.6.1.5.5.7.3.2. First off, is this still the case in Windows 7/xp?If it is, how do I add that to a certificate with OpenSSL, FYI I am using the ca.cnf/server.cnf under the /etc/raddb/certs directory.Another question, has anyone got the MS Supplicant to work with Freeradius and a LDAP backend? If so can you point me in the direction of some good walk through?
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Oct 19, 2010
Is there a possibility in openldap to allow a user to only create/manage specific LDAP users?For example user "mailadmin" may only create/manage mail accounts in LDAP that are named like "m1342895"? Or a specific list of user accounts that are in a specific group?
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Aug 12, 2010
Set up a lab full of Lucid boxes that authenticate against the main university Sun ldap server and create local, limited, homedirs if they don't already exist.
The ldap server is freely accessible on our network and does not require authentication to do a query. Users will not be able to make changes on the ldap server from these workstations. I cannot set up homedirs of users manually - any one of 15,000 people could walk in and use one of these machines.
What I've got working so far: Authentication works, but when I log in through GDM, after a few errors, I get nothing but a blank desktop (with wallpaper and cursor). If I log in as a local user and su to an ldapuser I get assigned a home directory at /, which explains the errors; this kind of user can't write to /. I've seen posts on this but nothing that works for me.
The problem, as I've identified it: I'm using pam_mkhomedir to create home directories on first login, but I don't seem to have any way of telling pam_mkhomedir *where* to create the home directories. I've tried to use the nss_map_attribute in /etc/ldap.conf (like this: nss_map_attribute homeDirectory "/home/users/"uid), but my syntax is all guesswork - I can't seem to find anyone else trying to mangle a homedir this way.
Most either don't deal with the homedir thing at all, or if they do, they only cover nfs/smb shares.
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Feb 19, 2010
I am trying to deploy Kerberos and LDAP so users will be able to login in to a server on the edge of the LAN, and afterwards be able to establish a SSH connection to all the computers in that LAN without the need to type any passwords, and without the need for me to manage SSH keys [beside the SSH keys on the login server] and local user accounts.
1. When i create the users in OpenLDAP i use a template that i created by reading documentation from the Internet. In the template one piece of information that is neede is the UID. Is there any clever way the keep track of the numbers so i do not assign the same UID to two users, besides using a pen and paper?
2. For the users to be able to establish SSH connections between the computers, the host is going to be added to the keytab like this: ktadd host/client.example.com Is is possible to replace client with something genric so i do not need to mange these keytab files between the hosts?
3. Users will be logging on the the server on the edge of LAN by using SSH keys. How can i configure the setup so the users will recieve a ticket automatically when the logon without executing kinit and without entering a password, just by having a valid SSH key?
4. krb5kdc is running on all the network interfaces in the server i want it to only run on eth1, how can this be done?
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Jun 11, 2011
I've been using ssh for a LONG time to connect my laptop to my desktop with no problems. I use a non-standard port (nnnnn) and keys. After a power outage that caused a shutdown and reboot, I can no longer ssh into the desktop. The only changes I've made are updates (laptop and desktop both running ubuntu 10.04).
$ ssh -p nnnnn Desktop
ssh: connect to host Desktop port nnnnn: Connection refused
No messages are generated in any of the logs on Desktop!
$ /usr/sbin/sshd -T
port nnnnn
protocol 2
addressfamily any
listenaddress 0.0.0.0:12023
listenaddress [::]:12023 .....
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Mar 17, 2010
On April 10, 2010, I upgraded some packages on my Ubuntu 9.04 server. This included an upgrade to "ufw 0.27-0ubuntu2". I rebooted the server, and all appeared to be fine.
Now I've noticed that UFW is not logging blocked packets since that reboot. It used to do this. It is still logging the allowed packets that I've configured it to log.
Here's what a "ufw status verbose" says code...
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Mar 1, 2011
This morning I was looking at the router's log file and noticed a certain IP address was able to gain LAN access on port 2222. That just happens to be the port my SSH server is listening on! A whois search revealed that IP address is in Germany. As soon as I found this out I stopped forwarding all ports to this machine in my router.
how to tell what had happened, what information this person was able to obtain, and if he left any goodies behind that could hurt me? I've read through some of the logs on my computer and haven't been able to find much at all. I did have some personal information on the hard drives, but that information is encrypted. I'm thinking if they were able to get my SSH password then that information probably isn't safe either (assuming they have some of it).
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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 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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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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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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Apr 14, 2010
this is not on the master node, but rather the node that is being replicated to. The problem occurs when i query using ldapsearch or an `getent passwd` EG ldapsearch:
Code:
[root@cakeslave ~]# ldapsearch -x -b 'cn=Christian Unger,ou=People,dc=example,dc=org' -D "cn=replica,dc=example,dc=org" -H ldaps://cakeslave.example.org -w cakewalk
ldap_bind: Can't contact LDAP server (-1)
additional info: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
[code]....
The cacert.pem in /etc/ssl/certs and /etc/openldap/certificate are identical (check using md5sum). I have done an strace and found that it looks at /etc/pki/tls/cert.pem .
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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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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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May 31, 2010
we have a weird problem with our opensuse 11.2 server installation.
We want to set up a LDAP Server using the Yast-LDAP Server configuriation tool.
This indeed already worked weeks ago until....this week.
Maybe some updates??!
I do not know what happend exactly. The server just does not want to start again and throws following error:
Starting ldap-serverstartproc: exit status of parent of /usr/lib/openldap/slapd: 1 failed
This happend after a little check of the configuration, but without a change, with Yast. Google delivered only "reinstall your box"-answers.
So.. i did that. And now the "mystical" part: The SAME ERROR occurs with a fresh vanilla system with a brand new and simple configuration (certificats, database, pw...the first Yast config dialog...). I did not change the way i set it up.
I remember, when i did this the first time with 11.2 on that machine, when no problems occured...everything was running out of the box (except the "use commen server certificate" option...).
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