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.

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Enabling AES128_HMAC_SHA1 encryption method restricts local users from changing password - Bug?

I am facing this issues recently, Whenever I enable the AES128_HMAC_SHA1 encryption method for Kerberos in gpedit(path), We are not able to change the local user password via crtl+alt+del screen ...
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18 views

IPA RHEL7 AD - can't ssh with AD account to IPA host

No matter how hard I try, I can't connect to IPA using a Windows account in AD - I did what https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/windows_integration_guide/...
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8 views

Add multiple Service Principal Name to Keytab file on Windows

What command can I run on windows to add a SPN to a keytab file on Windows? It seems all the documentation I can find is for linux. I want to have multiple SPNs in one keytab file.
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61 views

ssh with kerberos ticket

When I log in to a server using OpenSSH, generated the Kerberos ticket on the /tmp/krb5cc_. 1 - how to generate this ticket and where is the conf file to create this ticket?2 - How to generate the ...
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85 views

Can't connect to SSH using Kerberos in Mac OS 10.12

My mac is joined to my AD and i'd like to connect my Linux servers using SSH kerberos auth.It doesn't work and gives me that error :ssh -k -v alex@jeedomOpenSSH_7.5p1, OpenSSL 1.0.2n 7 Dec 2017...
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98 views

Kerberos and NTLM authentication

Q1) How do I force Windows 7 client to always use Kerberos authentication protocol talking to other machines on network irrespective of whether using host name or IP address?Q2) Similarly, how do I ...
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173 views

Apache and Kerberos SSO with multiple vhosts and multiple SPNs

I would like to do single sign-on of a website in my windows box.I am using the Kerberos Authentication module of apache.This is working pretty fine when having just one web site.This is the ...
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1answer
46 views

Ubuntu user does not exist probably due to kerberos issue

I often run out of space in my file system with Ubuntu 16.04. This time after I have got the error that no space left in my drive, I have started to delete some old files. However, some errors kept ...
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44 views

Single-sign-on in DMZ / OpenLDAP

we have a dmz with several https-based services, which users from internal network use although as users from outside.To ensure authentification with the active directory user-credentials, we set up ...
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101 views

Enable auto kinit for local user

Is there a way to enable auto kinit while doing a console or ssh login (login using password, not passwordless ssh)?As of now, if do, su - username and kinit I get a valid token created. But how do ...
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65 views

Windows equivalent of Linux ksu (Kerberized super-user) on windows?

ksu, Kerberized super-user, command is able to use a credential cache file (i.e. containing Kerberos ticket for user u1) in order to execute a shell/command with user u1.I have worked long time with ...
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106 views

Kerberos ticket in tmux session

I have two servers, on both I need to authenticate with kerberos. If I don't have a valid kerberos ticket, I cannot login on server A. On Server B, I can login without a kerberos ticket, it will ...
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144 views

Kerberos host authentication

I've set up a kerberos server with following configurationkrb5.conf:[logging]default=FILE:/var/log/krb5libs.logkdc=FILE:/var/log/krb5kdc.logadmin_server=FILE:/var/log/kadmind.log[...
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458 views

How to mount Windows share on Linux without using passwords?

I have looked at the manual of mount.cifs but it is a bit unclear to me which of the security methods (ntlm, krb5i etc) require password-based authentication, and which can do without.I have a ...
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247 views

How to set a local password on Ubuntu server16.04 with Kerberos authentication?

I use a Ubuntu server16.04 with Kerberos authentication on an ActiveDirectory server.My user account on the Ubuntu doesn't have a local password,I deleted it once, but have a Kerberos password, so I ...
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30 views

Elliptical Curve Cryptography in Hadoop

Does Hadoop distributed file system use Elliptical curve cryptography anywhere for securing its data? If not, which method is used by it to secure data access?
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34 views

Change from wired network to wireless (wireless->wired) relogin outlook and skype for business

Whenever I change from my wired network to my wireless network of the other way around. I'm prompted to challenge my credentials again. How can I set this up that I don't have to this again.relogin
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1answer
60 views

Ports required for web login with domain SSO

I have a IIS on a server which is a member of an AD domain. The app is using Windows Integrated Authentication and users want single sign-on. Besides the web app's port (80) are there additional ...
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620 views

SSH Single-Sign On with Kerberos

I want to authenticate with SSH through Kerberos SSO. Now when I'm logged in with my user principal on sourcehost I get my Kerberos Ticket but can't use it to SSH into targethost.The problem seems ...
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1answer
26 views

Exporting and importing Active Directory users

We need to export all the users (~20000) to newly installed Active Directory 2016 server from our existing Active Directory 2012 server, the problem is that we have not user passwords, and I wonder if ...
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1answer
355 views

How to request (not renew) Kerberos Ticket every 5 days on Ubuntu

I have set up a ubuntu 16.04 machine and integrated it into a windows active directory domain environment using this guide: https://www.unixmen.com/how-to-join-an-ubuntu-desktop-into-an-active-...
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1answer
103 views

OpenLDAP+Kerberos nightmare

So for the past few weeks I've been configuring an SSO solution for our small company.Right now I have a server running OpenLDAP 2.4.4 with kerberos (openldap backend).Users can login and get a ...
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150 views

Mac authentication to Apache-Kerberos

I have an Apache server using Kerberos authentication to serve internal apps, using Active Directory as the KDC. This works fine for Windows clients. We have a few Mac clients and none of them can ...
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92 views

Smart Card > Kerberos > Putty > Internet

I'm searching for a posibility to bypass the "Firewall". I've tried everything I know more than 2 weeks, so I ask here for a answer.We have no admin rights and the OS is Windows VistaThere is an ...
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225 views

Login to GNOME (Fedora) using my FreeIPA credentials

I have a FreeIPA Server (Fedora Server 23) and a FreeIPA Client (Fedora Server 23 with GNOME). Everything works excepts one thing: I can't login to Fedora Client with my FreeIPA username and password. ...
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4k views

Mount a Samba share using Kerberos ticket

I have a Samba server (which is the domain controller), and a Ubuntu 14.04 Client with a logged user who is authenticated by Kerberos (the client joined to domain with Likewise). The user want to ...
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1k views

kerberos ticket not renewable

I followed all recommended MIT kerberos configuration settings. I created a principal and when I do kadmin.local getprinc I see the following kadmin.local: getprinc centos@HADOOP.PSMPrincipal: ...
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557 views

How to disable Kerberos authentication for Outlook on Windows 7?

A bit of background: I'm trying to debug an issue with Outlook taking a long time (20s) to connect to Exchange 2013 when being on the same network as Exchange (connected with Ethernet cable) but ...
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204 views

Why do I get duplicate Kerberos service tickets with no realm?

Under what circumstances will I obtain apparently-valid service tickets that are duplicates and that don't have an associated realm? That is, does this indicate a mis-configuration somewhere? Does it ...
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1answer
478 views

Restricting ssh access to server within a kerberos/ldap infrastructure

I have a MIT-Kerberos / OpenLDAP infrastructure. I want to limit the ssh-access for my users, so that only members of a specific group are allowed to ssh to my servers.When I just had OpenLDAP ...

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