Ubuntu Servers :: Kerberos - LDAP - NFS ?
Feb 7, 2011
I've currently got Ubuntu server configured so that clients can login using LDAP user accounts that I've created using ldapadduser (from the ldapscripts package).
I've also got NFS exports working so that /home can be exported to clients. Kerberos authentication is enabled for NFS and clients require a nfs/clienthostname.domain principal to be able to mount the NFS share.
However, I now realise that for LDAP users to be able to access the mount they need their own Kerberos principal. If I run kinit dan@DANBISHOP.ORG then I can access /home/dan as user dan otherwise I get permission denied.
My question then is how best to proceed... is there a way to configure the client/server so that once a client has mounted the nfs share using Kerberos, all users can access it without their own principal?
It seems more usual to create kerberos principles for all users, but then how does one manage users? Using ldapscripts is very easy, but if the admin then has to manually create kerberos principals everytime, it could become very tedious. Furthermore how do users change their password if kerberos is used for authentication?
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Jul 29, 2010
I have installed servers(10.04 LTS Server) with Kerberos + LDAP, now I can ssh to all those servers and login with kerberos principle. But when I want to change password, I got such error:
Code:
Current Kerberos password:
Enter new Kerberos password:
Retype new Kerberos password:
Password change rejected: Password not changed.
Kerberos database constraints violated while trying to change password.
passwd: Authentication token manipulation error
passwd: password unchanged
I have search this issue but cannot any useful information. Would someone give me a direction?
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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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Apr 21, 2011
I am confused with the concept of Kerberos and LDAP SSL. I am in the midst of integrating my Unix box with the Active Directory hence the use of PAM_LDAP method. I understand that since it's non-secure transmission hence We use Kerberos to authenticate. If we already used kerberos to authenticate i.e. it means that the username/password is not transmitted in clear text. Why we still need LDAP SSL? What is the benefit?
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May 26, 2011
In the OpenSUSE documentation I red this very exciting chapter Chapter 6. Network Authentication with Kerberos That mentions "Using LDAP and Kerberos" which combined with NFSv4 would give my office net functionality of a M$ Win network.
We are still on 11.2 (we have no win clients at all) and I was testing different setups of 11.4 in VM, but I can't get YaST to configure the LDAP with Kerberos setup (our current setup does not use Kerberos only LDAP). Unfortunately I could not find any meaningful HOWTO on how to do it in SuSE. The page in docs involves editing config files, but I would like to avoid this, because from my former experience with Samba, as it would mean I cannot use yast anymore and that is sad.
Is there a way to configure LDAP + Kerberos (in terms of issuing of krb tickets at login) with YaST?
PS: I basically need Kerberos for NFS and Intranet site.
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Jul 27, 2011
I am interested learning about networks in Linux and prefer to use Ubuntu. I hope the title is reflects what I really need to know. If not sorry about that.I have an requirement, it is to have a server to handle authenticaition of users so generally users can use that server to use specific services such as login (to linux), mail (postfix) and perhaps a file server (to hold user data, lets say what we have on /home/[username])I did some reading, and it looks like I will need LDAP and Kerberos. But I couldn't get a good understanding on how to practically deploy such a service.I would be obliged if some you guys can give me some guidelines on how to achieve my goal. Topics I need to read, books I could refer would be a plus.To tell you some thing about me, I am not a *NIX guy, my knowledge is kinda just above basic.
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Apr 23, 2011
we're running an Ubuntu 10.04 LTS network on our company, authenticating against an Openldap/heimdal-kerberos server.Previously, the clients were authenticating against a Windows 2003 Domain without any problems.After modifying the krb.conf, ldap.conf, nsswitch.conf and nscd.conf files to authenticate the machines against the openldap/heimdal setup, we started experiencing strange problems.
One issue is, for example, the polkit-agent-gnome not starting. This component integrates policykit into gnome. It looks like the agent is unable to start due to some kind of delay with DBUS. Starting the agent manually keeps giving errors until about 70 seconds after login, when the agent can be started without problems. During the delay it is also impossible, for instance, to open the "shut down" menu on the top right of gnome. You can click on the menu, but nothing appears.Trying to start the polkit-agent manually gives these errors (I'll be attaching detailed errors when at work!):
Code:
DBus error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken
GLIB ERROR ** default - Not enough memory to set up DBusConnection for use with GLib It really looks like DBus or something related to it is starting "too late" but I can't seem to find the reason. I'm pretty sure this has to do with some timings or whatever in the krb/ldap config files...
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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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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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Dec 29, 2010
i have 2 machines:
first machine: Samba
second machine: LDAP + Kerberos
I found to many tutorials that samba is installed on the same machine as LDAP + Kerberos. is there like a tutorial how samba can be integrated with kerberos from different machine?
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Apr 6, 2010
I can't open 754/tcp por for kerberos propagation, the service is krb_prop.The file /etc/xinetd.conf:
Code:
defaults
{
[code]....
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Dec 25, 2010
I am having trouble with setting up BIND9 for 6 virtual servers that use ubuntu x64 v10.10. I have main server running ubuntu as well. host name is xeonserver I would like to explain my setup first.
my router ip: 192.168.1.1/24 host server for VMs ip: 192.168.1.2/24 Then on qemu my virtual machines are in 10.0.0.0/24 network, gateway to my router is 10.0.0.1
1. kerberos.xeonserver (not configured yet) 10.0.0.2
2. dns.xeonserver (the one I have trouble with) 10.0.0.3
3. mysql.xeonserver (not configured yet) 10.0.0.4
4. apache.xeonserver (not configured yet) 10.0.0.5
5. ftp.xeonserver (not configured yet) 10.0.0.6
6. mail.xeonserver (not configured yet) 10.0.0.7
To configure it I followed instructions found on [URL]
[Code]...
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Dec 3, 2009
I have set up a 389 DS server and a kdc. However there is not a howto or any document concerning setting up the DS as a Kerberos database back-end. Nor is there a 389 DS forum, so I am asking here and hopefully some of you could possibly help or throw in some light as to this kind of setup.I have read the 389 DS features page and the Redhat documents but there is no reference to this feature.
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Aug 12, 2011
I am trying to configure windbind and kerberos on my Fedora 15 to connet to my Windows 2003 server environment. But I keep getting this message:
Code:
libads/kerberos.c:333(ads_kinit_password)
kerberos_kinit_password ECP01BCA$@MSA.MDSA.NET failed: Client not found in Kerberos database
Heres my krb5.conf:
Code:
[logging]
default = FILE10000:/var/log/krb5lib.log
[Code]...
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Jun 24, 2011
Is it even possible to use LDAP on Ubuntu 11.04? After a full day of googling, every guide I can find is either for another version of Ubuntu or is horribly broken (including the official docs).
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May 19, 2010
I've been working though [URL] tutorial trying to get openldap working.
When I get to the point where i'm setting up the client. More specifically when I do ldapaddgroup testgroup I am sent this error
"You must have OpenLDAP client commands installed before running these scripts"
I have installed the ldapscripts package along with all the required ones. Has anyone been through this, I imagine it's some little nuance that I am missing.
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Jul 7, 2011
I need to configure the DNS server and Ldap server in ubunru 10.10.
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Jan 20, 2010
I've got 8.10 of Ubuntu and currently running openLDAP and have SAMBA domain using this along with the PAM changes on all machines to authenticate the logins.Now I've got a situation where I need to change the organization it currently is dc=mycomp, dc=local and I need to change the "local" part.
I thought that I could slapcat it out then change all dc=local to dc=blech and then reload the LDAP database. Then go around and change all the ldap configuration points to match.I don't think its as simple as change the base dn and everything below that will update.
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Jun 18, 2010
I've just installed Ubuntu Server for the first time with the goal as setting it up as a proxy server for our Apple computers here since I can get neither ISA of OS X Server's firewall to play properly. So far I have the machine authenticating against our OS X OpenLDAP server and multiple NIC's setup ready to be connected to the outside world. My question is does anyone have a preference on what proxy I should be using? So far my search efforts seem to of turned up Squid Proxy as a favorite among Ubuntu users but I can't seem to work out how to get it authenticating against my OpenLDAP server.
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Dec 18, 2010
My scenario is based on Ubuntu server guide, can be found at [URL].. Step 1: I do as chapter 6, install OPENLDAP server, populating LDAP => run ok. Step 2: do as LDAP Authentication section => run ok. Step 3: Install samba => ok. Step 4: do as OpenLDAP Configuration section => there's a problem here: when I run the command:
Quote:
ldapadd -x -D cn=admin,cn=config -W -f /tmp/cn=samba.ldif.I can't login to LDAP server, it said that:
Quote: ldap_bind: Invalid credentials (49)
I am sure that the password is correct, but I still receive this message
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Jan 3, 2011
Ldapscripts seems to be authenticating oddly but I am not sure why. Running 'ldapadd' works without issue:
<code>root@domainator:~# ldapadd -D cn=root,dc=example,dc=home -W
Enter LDAP Password:
<CTRL-D>
root@domainator:~#
</code>
However:
<code>
root@domainator:~# ldapaddgroup test
>> 01/03/11 - 22:16 : Command : /usr/sbin/ldapaddgroup test
ldap_bind: Invalid credentials (49)
ldap_bind: Invalid credentials (49)
Error adding group test to LDAP
Error adding group test to LDAP
</code>
Here's various parts of my /etc/ldapscripts/ldapscripts.conf:
<code>
SERVER="domainator"
BINDDN="cn=root,dc=example,dc=home"
BINDPWDFILE="/etc/ldapscripts/ldapscripts.passwd"
SUFFIX="dc=example,dc=home" # Global suffix
GSUFFIX="ou=Groups" # Groups ou (just under $SUFFIX)
USUFFIX="ou=Users" # Users ou (just under $SUFFIX)
MSUFFIX="ou=Computers" # Machines ou (just under $SUFFIX)
GIDSTART="10000" # Group ID
UIDSTART="10000" # User ID
MIDSTART="20000" # Machine ID
</code>
/etc/ldapscripts/ldapscripts.passwd permissions are root:root, 0400 a
And I have quadruple checked my password is correct. Is there a way to print out debugging from ldapscripts so I know what commands it is generating?
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Mar 16, 2011
i am taking another stab at this. The last time i attempted it, it seemed like everyone had a different way to do it, but nobody could give me an answer on how to do it...
I currently have a Domain Controller Running sme server and a domain controller, using ldap as a backend. I have two file servers runing ubuntu 10.04. My overall goal is to have it so when i create a username on the domain controller, it is then automatically copied over to the fileservers. This way everyone will have their own username and password to access the fileservers and ill be able to track what people do on the fileservers.
The next necessity is for me to be able to apply permissions to the folders on the fileserver based on the users that are created on the domain controller.
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May 23, 2011
I have been stuck with this for quite some time now. I have installed ldap and configured it as per instructions fromI am able to query the ldap server without forcing the TLS operation to be successful.But with ldapsearch -d -1 -x -h servername -ZZ -b dc=example,dc=eduI get the error
TLS: peer cert untrusted or revoked (0x42)
TLS: can't connect: (unknown error code).
ldap_err2string
[code]....
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May 29, 2011
I have configured and installed LDAP.in /etc/ldapscripts/ldapscripts.conf I have set:UTEMPLATE="/etc/ldapscripts/ldapadduser.template"File which contains:
dn: uid=<user>,<usuffix>,<suffix>
objectClass: account
objectClass: posixAccount
[code]....
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Aug 3, 2011
I have a query regarding login to roundcube via dovecot ldap. I have installed and set up the openldap on Ubuntu Server 11.04 with the help of the following article [URL]. I have also installed Postfix, Dovecot, Dovecot-ldap and roundcube as the mail client. Then, I went on to test if I can login through roundcube. I received "login failed". I'm sure the dovecot is running fine as well as Postfix and openLDAP server. All I can find from the log was "auth(default) LDAP: Can't connect to server: localhost".
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Aug 26, 2011
LDAP Authentication for Web Access I am trying to build a LDAP server to allow access to the wireless network in conjunction with Meraki wireless access points. I am using Ubuntu 10.10 and trying to install OpenLDAP from their documentation but I keep running into the error "configure: error: MozNSS not found - please specify the location to the NSPR and NSS header files in CPPFLAGS and the location to the NSPR and NSS libraries in LDFLAGS (if not in the system location)" I have OpenSSL installed but I also got these when I ran ./configure
checking openssl/ssl.h usability... no
checking openssl/ssl.h presence... no
checking for openssl/ssl.h... no
checking gnutls/gnutls.h usability... no
[code]....
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Feb 27, 2010
I've been trying to set up a Linux-only network and currently have a working DHCP, DNS, LDAP and NFS server, with a client that can authenticate with the LDAP server and a central /home folder.However, if I wanted to share folders on the NFS server, how would I make the share available to, for example, a particular group of users in the directory?I've never used NIS(+) on a network, but believe you can add a 'group' of users in the /etc/exports file--simples!Does anyone know of the best way to do it (even better anyone who is doing this in a production environment)?
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Apr 14, 2010
I would like to know whether ldap can be used to authenticate wireless clients with my server.server and clients are connected to a wireless router and i am able to get wireless adapter work in my ubuntu. Is there any anything extra which is required or the openldap server will work for wireless clients?
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Jun 15, 2010
Any step by step guide for LDAP server & client configuration. From installation.... to.... client login to ldap ubuntu server.
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Jul 7, 2010
I need to host a user directory and home directors on a Ubuntu 10.04 box. I've installed openLDAP and I can connect a mac to it. how to install the mac schema or add users etc to it. I can view the directory in Workgroup Manager on Mac OS X Server but I also dont know how to set the admin username or password.
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