Kerberos is a network authentication system based on shared key cryptography. It is the underlying authentication system used by current versions of Active Directory and is widely used by large organizations.

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Utilizing Samba Shares Without using Winbind

I am curious if it is possible to use samba shares without using winbind. In our current environment we are using SSSD, Kerberos, and Samba to complete the required tasks such as joining the windows ...
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kerberos : kinit not picking up updated values in krb5.conf

We are running kinit from our Linux command line and this works well. Before we run kinit we set the KRB5_CONFIG environment variable to point to directory continaing krb5.conf file linuxhost1$ ...
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Can't Login to Debian 7.7 with Kerberos/NIS user

I have a Debian 7.7 system I am trying to configure to use Kerberos and NIS, both served from an Active Directory server. I have kerberos set up such that I can kinit a set of credentials from the AD ...
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45 views

What role does krb5.conf actually play when joining a Linux machine to AD via Samba/winbind?

I'm working on a project for a standardized Linux image for our organization. This image will be domain joined, and I've written a script to fire on boot that will guide the IST person doing the ...
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987 views

Kerberos error after ArchLinux installation

I've installed ArchLinux successfully on my laptop yesterday. To do this, I've followed the Beginner's guide along with the Raid guide. I could do every step without problem, except the one for the ...
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52 views

How to automate ktutil to immediately list keytab entries?

I use MIT ktutil a lot on Linux and I am fed up using the following sequence, even if command shortcuts and file name completion are here to help: ktutil rkt my.keytab l Isn't there a way to get ...
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35 views

Why would SSH server not accept forwarded Kerberos ticket?

I have an environment where I can SSH in using forwarded Kerberos credentials (using ASP.NET delegation), however in another I cannot. I have GSSAPIAuthentication yes in the ~/.ssh/config on each ...
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62 views

Kerberos Forwarding in SSSD

So, I'm trying to set up forwarding with Kerberos and seem to have some problems. On some of my servers I'm able to forward after receiving a ticket; however, some I'm not. My system setup is a ...
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50 views

List Kerberos principals with valid TGTs

Is it possible to query my (MIT) Kerberos KDC to return a list of principals who have been issued TGTs that are currently valid? My use case is that I would like to find out which users are currently ...
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81 views

Understanding Kerberized NFSv4 Authorization

Articles such as this one seem to point out that Kerberizing NFS(v4) mounts not only prevents machines without a Kerberos service ticket from mounting the shared directory but also uses the user's ...
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275 views

How would I build a linux based router?

I am looking into building a Linux based router out of a home-built Linux server. I don't have much experience with the software required however. I would like the server to run the following ...
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123 views

Kerberos authentication fails with forced password change

I have configured PAM authentication to use Kerberos and can authenticate correctly with my principals using their Kerberos credentials. I ran into trouble when I tried to create a principal with an ...
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192 views

Get a Kerberos service ticket from the command line

I am in the process of debugging a Kerberos setup. I have a valid krb5.conf and I can call kinit USERNAME to get a Ticket Granting Ticket (TGT): Credentials cache: /root/krb5cc_root Default ...
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1answer
121 views

Integrating LDAP and Kerberos V to add users via a useradd-like interface

I'm currently trying to set up an integrated Kerberos V/LDAP system for authentication/authorization. From what I have managed to gather, there are at least two ways to integrate Kerberos V with LDAP: ...
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890 views

How to set up Active Directory authentication on CentOS 6.5?

I have: 1. A CentOS machine to which I have SSH and STFP access. 2. The machine is on network where there is a MS SQL Server database and Windows shared drives. 3. All authentication seems to be with ...
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330 views

Apache mod_auth_kerb: “Key table entry not found”

I want to use the Apache Module "mod_auth_kerb" to implement SSO for a Webapplication. With the following config: <VirtualHost 10.5.3.200:443> #Proxy <Proxy *> Order deny,allow Allow ...
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57 views

Is it possible to attach `kinit` to the first attempt to `ssh` without a Kerberos ticket?

My university uses Kerberos-based authentication for login to our unix servers. One way to get passwordless login is to run kinit, type my password, and then run ssh@host. For this setup, I do the ...
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174 views

How is a username determined and can I hide the domain component in a winbind username?

Someone asked a question on Server Fault about a problem which I'm also having but no one has answered it so I'm posing a slightly different question to try and figure it out myself. I've configured ...
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710 views

How could I eliminate Kerberos for passwd?

When I issue a command to change my password like this: sudo passwd huahsin The system prompt me: Current Kerberos password: I don't know what I have done to the system configuration, how could I ...
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110 views

kdb5_ldap_util fails with cryptic error

Supposedly, in order to set up Kerberos, I need to run kdb5_ldap_util, though I'm not sure why. However, it fails with: # kdb5_ldap_util -D cn=admin,dc=example,dc=com create -subtrees ...
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551 views

How does Linux winbindd determine available domain controller?

We are actually in preparation of taking down one of our three domain controller (Win2k3). They are all serving the same domain. Actually we still see connections incoming from Debian (5/6/7) Servers ...
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59 views

How to obtain current user environment in pam_script?

I'm running pam_script after pam_krb5 with a session open script. In my script, I need to use the ticket cache generated by krb5 to do something. Well, the script was actually run as root, and ...
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How do I setup kerberos authetication in Fedora 19

I cannnot seem to find documentation on setting up Kerberos authentication on my Fedora 19 workstation. Which files and programs are involved? My Kerberos server is a corporate AD.
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11k views

SSH authentication using gssapi-keyex or gssapi-with-mic (publickey not permitted)

My company has disabled SSH public key authentication, therefore I have to manually enter each time my password (I am not suppose to change /etc/ssh/sshd_config). However gssapi-keyex and ...
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tmp/krb5cc_[uid] is not getting purged regularly (kerberos credentials cache)

An ftp id wasn't able to authenticate itself using kerberos because it wasn't able to create /tmp/krb5cc_[uid]. This was caused because /tmp ran out of inode space, as there were innumerbale (don't ...
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92 views

kinit returns error salt type 3 unsupported on FreeBSD 9.1-RELEASE install

When attempting to run kinit to log into a Kerberos V5 realm I get the following error on a default install FreeBSD 9.1-RELEASE kinit: krb5_get_init_creds: salt type 3 not supported Any ideas?
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1k views

What is the kerberos keytab file used for in UNIX/AD kerberos authentication?

I have proved that UNIX/AD Kerberos authentication works without the presence of a keytab file so I'd like to know whether I should worry about it (given I'll need an individual keytab for each server ...
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447 views

Multiple PCs network centralized system authentication

(I couldn't really choose an accurate title as I don't know exactly what the feature I'm looking for is called. Sorry about that. I hope that the following lines may clear this aspect.) I own a dozen ...
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1answer
736 views

Keep kerberos ticket across sudo invocation

On a regular linux machine, when I use sudo -s as a normal user, I become root but HOME still points to ~user, so every admin has his own environment etc. (this is without env_reset or always_set_home ...
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267 views

Command-line web browser with Kerberos authentication?

QUESTION: Is there a Kerberos-friendly web browser usable via an SSH console? I have tried links but it does not seem to work with Kerberos (the webapp asks me for login/password even though I have a ...
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427 views

Public Key Auth + Kerberos

I've setup public key authentication for ssh'ing into my university machine. However, it only logs me in on the local machine and doesn't give me Kerberos credentials which I need for accessing my ...
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367 views

PostgreSQL on FreeBSD - 'Kerberos 5 authentication not supported'

I've been trying to get a FreeBSD machine to talk to a networked postgreSQL database. I assumed that the machine had kerberos installed, as it's what I use to log in, and I was told that FreeBSD has ...
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1answer
4k views

Java could not get the TGT from cache in Linux client

I have set up a Kerberos server and OpenLDAP in RHEL5.5. I also have a RHEL6 machine as a client. I have run my Java program using jaas to query the OpenLDAP server from the linux client. I can query ...
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2answers
3k views

Automatic kerberos ticket initialization on login

I'm using ksshaskpass to add my password protected keys into ssh-agent upon logging into KDE, is there something similar for kerberos?