Kerberos is a computer network authentication protocol, which allows nodes communicating over a non-secure network to prove their identity to one another in a secure manner. Its designers aimed primarily at a client–server model, and it provides mutual authentication — both the user and the server ...

learn more… | top users | synonyms

0
votes
1answer
169 views

Add custom headers to HTTP 401 responses from Kerberos mod_auth_kerb

I'm using Apache with mod_auth_kerb to perform HTTP authentication. How do I add custom headers to the 401 Authorization Required response generated by the auth module? The relevant sections of my ...
0
votes
3answers
428 views

Kerberos Authentication for workstations not on domain

I have a base understanding of how Kerberos works in an Active Directory environment and the methods it uses to authenticate users and workstations onto the network, but my question is.. since ...
4
votes
1answer
261 views

How can I force sudo to accept a user's AD password on RHEL6

In our environment we do not join Linux boxes to the Microsoft Domain. We do however setup Kerberos. This allows us to log into the boxes using our AD credentials as long as there is a local account ...
3
votes
2answers
159 views

Why do kerberos HOWTOs specify to copy keytabs securely to the host? Is networked kadmin not secure?

Kerberos HOWTOs often have words similar to these: Securely transfer (via flash drive, disk, or encrypted connection) the keytab to the client host. Is logging in on the client host as root, ...
0
votes
1answer
147 views

setting kerberos ktpass ktab all that JAAS

I have a couple of questions on Kerberos on Windows. I want to find out what the purpose of mapping a user to a service using ktpass is. For example I am on windows and I run ktpass like this: ...
2
votes
1answer
53 views

How does a Kerberos Client determine the Service Name portion of an SPN?

If I deploy a server call FOO/host.example.com@myrealm how does a client become aware that the service name is FOO? ENV: Unix / MIT kerberos 1.4 or 1.10 I see windows has some sort of mapping: How ...
1
vote
1answer
277 views

IIS, SQLServer, Google Chrome and Windows Authentication

I'm searching the internet for almost 4 days now and I'm stuck. I've created a simple ASP MVC4 Intranet website and I have deployed it to server called: iis. That computer is inside the same domain ...
1
vote
3answers
226 views

SSH + Kerberos but WITHOUT DNS

I was wondering if there's a way to set up SSH with Kerberos authentication without using a DNS server at all ?
1
vote
0answers
60 views

How Does an Exchange Alternative Service Account Credential work?

I recently had to assist with setting up an Exchange Alternative Service Account (ASA) credential on an Exchange CAS array. We did get the ASA working properly however I have some questions about how ...
2
votes
1answer
64 views

OpenLDAP+Kerberos authentication – id (NSS) works, but authentication says user is unknown

I have a central authentication server with OpenLDAP set up and populated, and Kerberos 5, also populated. On an Ubuntu LTS machine, I set up nslcd and kerberos client stuff. This way, issuing the ...
1
vote
0answers
580 views

Windows 7 NFS Client Using Kerberos and Linux KDC

I am trying to configure a Windows 7 Enterprise client to mount a NFSv4 share on a Linux NFS server using Kerberos and a Linux KDC. The setup is: IPA Server (OS: Scientific Linux 6.4, Pkg: ...
7
votes
3answers
423 views

Ubuntu 12.04, Windows 2012 Active Directory Integration, Kerberos won't resolve service principals

after having checked the whole internet literally, I hope that I might get help here. I am trying to accomplish integration of ubuntu 12.04 servers into a Windows 2012 active directory with nfs and ...
1
vote
2answers
467 views

mounting windows shares on linux while keeping windows permissions

I have a windows share on a windows2003 server (WINJOE) which I want to back up to a Linux machine (LINUXJOE) that is properly joined to the domain. My goal is to backup shared folders of WINJOE to ...
0
votes
1answer
545 views

Kerberos pre-authentication failed on nfs mount

I have the following nfs export: /home/users 192.168.1.0/24(rw,sec=krb5p,no_subtree_check,nohide,async,anonuid=65534,anongid=65534) When trying to mount that on a client I get: client:/home # ...
2
votes
1answer
3k views

Kerberos broken when upgrading Snow Leopard Server to Mountain Lion

I work for a small company where there's no dedicated system admin. I was tasked with upgrading our file and calendar server to 10.8, which I did by upgrading the OS then installing the server tools ...
0
votes
0answers
563 views

Change local password as root after configuring for MS-AD Kerberos+LDAP

I have followed this excelent post to configure Kerberos + LDAP: http://koo.fi/blog/2013/01/06/ubuntu-12-04-active-directory-authentication/ However, there are some local users used for services. When ...
2
votes
1answer
646 views

Company Wide Windows Auth with Chrome and Firefox

I know that we can allow Firefox to allow passing through of Windows credentials by editing the following about:config settings --If using Kerberos-- network.negotiate-auth.trusted-uris ...
1
vote
1answer
34 views

Is it possible to set up cross realm Kerberos

We have a setup with an IIS and a SQL server and have implemented Kerberos to use SQL Sercurity directly. We have a AD forest: Internal.local and the setup works fine there. Now the customer wants ...
0
votes
1answer
437 views

Problems mounting Kerberos authenticated NFS share on CentOS 6.4

I'm trying to mount a Kerberos authenticated NFS share on a CentOS 6.4 machine. I have tried exporting the protected share from both another CentOS 6.4 machine and from our NetApp with the same ...
1
vote
0answers
111 views

Integrating Kerberos authentication on Apache with a Git server

First time asking a question here so I hope I'm in the right place to do so. I've also searched for similar problems on here, but couldn't find anything quite as similar. Here's my problem. We ...
0
votes
2answers
500 views

Kerberos with LDAP backend still using db2

I've installed and configured LDAP, installed and configured kerberos to use LDAP as the backend, as follows: [dbdefaults] ldap_kerberos_container_dn = dc=voltage,dc=com [dbmodules] ...
2
votes
2answers
4k views

help using setspn and ktpass

I'm trying to set up the SPNs and create a keytab file for tomcat kerberos spnego Single sign on. the server running tomcat7 is ubuntu-ad1.wad.eng.hytrst.com the KDC is kerberos.wad.eng.hytrust.com ...
0
votes
0answers
211 views

Mysterious kinit-failure on Debian Jessie

I have a machine with the Samba 4 AD and the second as a client. After two days of good operation, suddenly the kinit stopped working on the client-side. The reason is quite mysterious. It cannot ...
5
votes
2answers
384 views

Risks of Kerberos Delegation

I've been spending hours upon hours trying to learn and understand Windows Authentication, Kerberos, SPNs, and Constrained Delegation in IIS 7.5. One thing I just don't get is why it is "risky" to ...
2
votes
2answers
3k views

debian: cannot change password

As the root user, I can change the password: hussie:/home/claudiu# passwd Enter new password: Retype new password: passwd: password updated successfully As a non-root user I cannot: ...
0
votes
2answers
464 views

apache using mod_auth_kerb always asks for the password twice

(Debian Squeeze) I'm trying to set apache up to use Kerberos authentication to allow AD users to log in. It is working, but prompts the user twice for a username and password, with the first time ...
5
votes
3answers
1k views

SSH Kerberos authentication fails with “Wrong principal in request/Got no client credentials” on debian squeeze

I have a debian squeeze host where I can't log in with kerberos without a password prompt. An identically configured ubuntu 12.04 host works fine and can log in without getting a password prompt. ...
0
votes
1answer
47 views

Mail client with support for gssapi

I have configured Postfix and Cyrus Imap to enable SSO using Kerberos and GSSAPI. I use Thunderbird as a mail client which supports GSSAPI but I wanted to try some other client also. I tried ...
3
votes
2answers
12k views

Does kerbtray.exe not exist for windows server 2008

I can not find a valid kerbtray.exe for windows server 2008. I can only find for 2000 and 2003. Does it not exist or it is just replaced with something else?
0
votes
0answers
270 views

GSSAPI Error: Server not found in Kerberos database

I'm unable to make working a simple configuration written in Samba Wiki. NSLCD worked fine, when authentized by name and password. But I have no idea, what can I do wrong when following that simple ...
2
votes
0answers
214 views

Authentization agains Samba4 domain controler and not working kinit

I've a problem with Samba 4 and Kerberos. If I call kinit, it writes Client not found in Kerberos database while getting initial credentials. I find out, that the Kerberos works with user name only, ...
1
vote
1answer
330 views

Kerberos on IIS 7.5, unknown error - how to troubleshoot

I have a asp.net site installed on a server owned by a client. The client now, due to using MobileIron for single-sign-on capabilites on mobile devices, requires my site to work with Kerberos ...
1
vote
1answer
224 views

Alfresco with only MIT Kerberos: What authentication.chain?

I want Alfresco to authenticate users using SSO with MIT Kerberos. What authentication.chain should I use? I tried authentication.chain=kerberos1:kerberos without success. Based on this answer I ...
6
votes
0answers
2k views

Kerberos NFS4 permission denied [closed]

** Edit: ** I am not using Sabayon Linux anymore and this problem didn't occur on other distributions. I suggest to close this question. Update: I realized that because of bad hosts file, both ...
-1
votes
1answer
36 views

Setup kerberos on windows 7

I am developping a java web application application for a client which use kerberos spnego to authenticate its user. Kerberos itself is "plugged" to a LDAP They send me a documentation with what to ...
0
votes
0answers
74 views

browse samba shares and login with ssh at the same time[Active Directory]

hello, i have a problem with krb5 and samba. when samba is running(i can browse shares with domain account) i can not login with ssh. And when samba is NOT running i can login with ssh with domain ...
1
vote
1answer
72 views

Connecting to Mac OS X VNC with Kerberos authentication [closed]

I'm running Mac OS X Server with remote administration. Apple uses VNC with (I believe) Kerberos authentication. I do NOT use a VNC password, just the user-based authentication. I need to find a VNC ...
1
vote
2answers
5k views

kinit & pam_sss: Cannot find KDC for requested realm while getting initial credentials

I have a very similar problem as described in this thread on CentOS 6.3 authenticating against a 2008R2 AD DC. Here is my krb5.conf, I know for a fact that XXXXXXX.LOCAL is the true domain name: ...
0
votes
1answer
46 views

To identify which application uses kerberos authentication

i need to identify which application / process requesting kerberos authentication. Eg I have an PC for login i am using windows AD account. In that pc there are several applicationslike outlook, ...
0
votes
1answer
40 views

DNS Portability with regards to LDAP/Kerberos

How portable is a DNS server when it comes to LDAP, especially Kerberos which I am using for authentication? Meaning, how much do I have to change to use the same LDAP server with 2 different DNS ...
1
vote
2answers
204 views

How does Cron interact with Kerberos for authentication?

I have a CentOS 6.4 machine which is set up with pam_ldap and pam_krb5. It is configured to use our Active Directory servers for authentication. I can SSH into the machine using AD accounts. I have ...
3
votes
1answer
202 views

Does IIS NTLM/Kerberos authentication still work with an offline domain controller?

We have multiple IIS instances spread across remote regional branches. Each IIS instance (v.7.5) is running the same application and authenticates its users with Integrated Authentication (NTLM in the ...
1
vote
1answer
76 views

krenew command not working : Permission Denied

I am using a Linux server to perform my simulations. The login and the file-system of the server are protected using kerberos. The file-system is supported using NFS. Since my simulations take a lot ...
0
votes
0answers
23 views

Get Service_key in the course of kerberos authentication

Built environment 1) Exchange server: The operator system of Exchange server is Windows Server2008R2, We configured it as Active Directory (primary domain controller) used for client ...
0
votes
1answer
155 views

AD Login to Solaris Zone Periodically Not Working

I have a Solaris 11.1 zone named "AZone". I have the zone joined to an Active Directory domain (Windows Server 2008) with the goal of users being able to use their AD account to log in to the Solaris ...
0
votes
1answer
134 views

Kerberos authentication of Windows clients and Redhat 5.5 with Samba PDC?

I already realize that configure Redhat 5.5 as PDC (Primary Domain Controller), and the clients (Windows XP and Windows 2003) can join the realm. The realm name of Linux server is EXAMPLE.COM. ...
3
votes
1answer
195 views

Is there a way to have tortisesvn use Windows 7 kerberos tickets to auth against an apache svn server?

I have putty able to use gssapi on my Windows 7 x64 clients against kerberos logins for SSH. I.e. it forwards the ticket you get when you log in to windows. I can't figure out how to get tortiseSVN to ...
-1
votes
1answer
48 views

Why there are three rounds of message exchanges for integrated windows authentication for IE

According to the result monitored by fiddler, there are totally 3 handshakes for integrated windows authentication for IE. GET /home - 401 Unauthorized WWW-Authenticate: Negotiate, NTLM GET ...
3
votes
2answers
3k views

0x19 KDC_ERR_PREAUTH_REQUIRED in my event log

So I have a server, and every time a user or service account logs on to the machine, an error event is generated in the System log: A Kerberos Error Message was received: on logon session ...
0
votes
1answer
74 views

Tool to allow Kerberos Authenticated users to modify Firewall settings

I run a firewall on a central router. Recently, several users want to use Skype. Since firewalling Skype virtually means to switch the firewall off, I consider to allow users to temporarily punch ...