Questions tagged [kerberos]
Kerberos is a network authentication protocol.
84
questions
0
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0answers
25 views
How to set up pam_mount?
I am trying to automount SMB shares from a Synology NAS on a client running Ubuntu Studio 18.04 (yes I know it is out of date and plan to upgrade to 20.04.2 soon). I have tried using autofs, but have ...
0
votes
0answers
101 views
AutoFS CIFS Mount with Kerberos Fails at Boot Ubuntu 20.+
I have autofs mounting cifs user home folders at log in/boot absolutely fine on 18.04.
Ever since 20.04, it now fails initially at log in, then after a delay, it will mount.
All machines that are ...
1
vote
1answer
84 views
Domain AD users aren't get discovered after adding Ubuntu under AD domain control
I've Joined a my ad domain with my Ubuntu 20.04.2 LTS VM (I followed this doc) and I'veJoined the AD domain with Ubuntu as
sudo realm join -U Administrator win2016.local
realm list show below output
...
0
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0answers
138 views
Ubuntu 20.04, PolKit and FreeIPA
Trying to get FreeIPA client working on Ubuntu 20.04 desktop 100% is a frustrating experience. The basic set up, logging in with a kerberos account is ok, but it's things like getting commands and ...
0
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0answers
56 views
KRB5 preauthentication failed
I try to authenticate on a Ubuntu 20.04 server joined to a Windows 2012 R2 AD domain, but it fails with "Preauthentication failed" errors. I have configured the Ubuntu server the same way I ...
0
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0answers
47 views
How to mount a windows share to ubuntu 18.04 using a kerberos ticket (for all users) (no credentials file)
I am aiming to mount a windows share to one of our ubuntu 18.04 machines, we aim to do mount the share using a Kerberos ticket, we wish to have the mount accessible for all users and want to avoid ...
1
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0answers
236 views
Active Directory Ubuntu 20.04 [closed]
I'm adding my ubuntu 20.04 to my company's Active Directory
I set everything up correctly, all the testicles work, he even pulls the name
user, when logging in but it appears as invalid password, I ...
0
votes
0answers
211 views
vsftpd Authenticating FTP server against Windows AD server not working
I'm new to Linux, and I'm trying to authenticate vsftpd server against my Active directory server.
I have joined the domain successfully following this article:
https://nerdonthestreet.com/wiki?find=...
1
vote
1answer
98 views
Ssh conection issue
I'm trying to establish a connection with Fermilab servers. For this I use both Kerberos protocol and ssh to connect my computer; however I only receive kerberos ticket and this message from terminal ...
0
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0answers
61 views
Login on Ubuntu 18.04 via FreeIPA fails
I have set up a FreeIPA server on a Ferdora 32 VM Connecting from another Fedora VM and authenticating it works fine. Now I would like to use this in an Ubuntu 18.04 LXC among others. The installation ...
0
votes
1answer
461 views
How can AD users on Ubuntu client seamlessly access files and folders on Synology DC?
I have joined a PC running Ubuntu Studio 18.04 to an AD domain managed by Synology Directory Server. I can now log into the Ubuntu PC with the credentials of a domain user, but there are still two ...
0
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0answers
36 views
How to create an offline script with zip file to be run instead of running an apt-get install command? [duplicate]
I'm helping someone to install a Kerberos Linux Client on a Ubuntu 18.04 LTS server which is currently offline from the internet. This will be later used to setup authentication to connect to a Kakfa ...
0
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1answer
28 views
OLD krb5-appl packages
All.
Question:
Do you know where to find package (or substitute package) on ubuntu 18? below:
krb5-clients : Precise (12.04) : Ubuntu
krb5-ftpd : Precise (12.04) : Ubuntu
krb5-rsh-server : Precise (...
1
vote
0answers
638 views
Problem configuring MSSQL client and Kerberos authentication
I have a problem configuring an Ubuntu 18.04. client to connect to MSSQL Server using Windows Authentication.
First of all, Kerberos/AD Login works fine using PAM and Winbind, connection using SQL ...
1
vote
1answer
2k views
CIFS share on fstab via krb5
I have followed; https://warlord0blog.wordpress.com/2018/03/27/access-dfs-shares-from-linux/
Through this I can mount the cifs share manually, however when I try to mount it in the fstab via kerberos;...
1
vote
1answer
988 views
nfs with kerberos: permissions
I followed the following tutorial to configure nfsv4 with kerberos https://help.ubuntu.com/community/NFSv4Howto
(with the difference that the NFS server is managed by zfsonlinux).
Kerberos is here ...
0
votes
1answer
934 views
Unable to login with Xorg using Active Directory
Recently i've installed an Ubuntu 18.04 VM on Hyper-V with enhanced session enabled.
Successfully joined it to Kerberos Realm in our corporate Active Directory.
While i am using "su - username" i am ...
0
votes
0answers
129 views
kerberized ssh client configuration on Ubuntu 16.04
Env:- 16.04.4 LTS (Xenial Xerus)
4.13.0-36-generic
I'm following this article (https://wiki.ubuntu.com/Enterprise/Authentication/KerberosServices ) for setting up kerberised ssh. Tried with ...
2
votes
4answers
11k views
Edit Sudoers file to allow sudo rights to a AD domain group
I recently managed to get my Ubuntu Server 18.04 machine connected to my companies Windows AD. I am able to login with my AD credentials however I want to take it a step further...
This is the ...
2
votes
2answers
807 views
Wrong start and expire date in credentials cache after kerberos auth
I log in to Ubuntu 18.04 successfully with kerberos/sssd authentification in an ActiveDirectory domain.
Since a few days I have an issue using my kerberos ticket/credentials cache to auth with some ...
2
votes
1answer
2k views
Unable to mount CIFS share using AutoFS and Kerberos
I can mount a CIFS share using mount directly from my terminal:
sudo mount -t cifs -o multiuser,cruid=1395409773,vers=3.0,sec=krb5 //fileserver2.mba.ac.uk/Z\ Drive /mnt
shows the following in /var/...
1
vote
2answers
252 views
Kerberos and Ubuntu 18
I am trying to configure a automated join to domain on my Ubuntu workstations. I have everything in place (I at least I believe so as the following command works fine)
net ads join -U <username>...
0
votes
1answer
2k views
Package krb5-kdc is not available [duplicate]
Ubuntu Server 18.04
Tried:
~$ sudo apt-get update
Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Get:3 http://...
1
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0answers
467 views
Integrate Ubuntu 18.04 box with one AD domain and user with other AD domain
I will try to explain my problem as simple as I can. I have the following problem:
Our organization has two Active Directory forests, in one hand computer.forest.com has the computer objects, in the ...
1
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0answers
530 views
18.04: NFS4 over Kerberos fails
On a 18.04-client NFS4 over Kerberos is fine against an old ubuntu 10.04 nfs4-server. It would not work however against a Netapp FAS3140 (which is accessible from 14.04 clients).
client_18.04_# mount ...
1
vote
0answers
3k views
realmd domain join with kinit in Ubuntu 18.04
I’m trying to set up an Ubuntu 18.04 machine and joining it to an Active Directory domain. Previously (e. g. on Ubuntu 17.10) I could do
# kinit -kt /path/to/keytab my_username
# realm join ad....
2
votes
0answers
251 views
Printing to smb with kerberos auth?
I want to set up a printer via samba client to a Windows printserver.
I managed to do it specifying this connection string:
smb://user:pass@printserver/printer
Is there a way to do auth through ...
0
votes
0answers
378 views
Kerberos SSH Login
I'm trying to setup a
ssh server
ssh client
kerberos server
Now, on both the SSH server and client I can poll a ticket by calling, kinit -p root/admin.
In SSH/SSHD config I set
...
3
votes
1answer
6k views
SSH with Kerberos authentication
I am encountering the following problem: I am trying to connect from a client VM to a server VM using SSH with Kerberos authentication, but SSH still asking me for password. Obviously, I modified the /...
0
votes
1answer
507 views
How can I configure local (USB) printers when a remote cups server is specified (in client.conf)?
In our organisation we have a central CUPS server (with Kerberos) for printing. On all Ubuntu clients this server is configured via the client.conf.
How can I add additional local printers (USB) to ...
10
votes
1answer
10k views
CIFS mounts and Kerberos - permissions on access or best practice
Currently our Ubuntu-Clients connect to cifs shares during system boot via /etc/fstab. This has the following disadvantages:
Passwords are written in plain text as mount option
The password should ...
0
votes
1answer
434 views
How to specify home directory with 'adduser' when user creation fails on a machine with NFS home directory and Kerberos authentication
I am using adduser --disabled-password to create a user that uses Kerberos authentication for letting them sign into their account. Therefore, the password is predefined by a central Kerberos database....
2
votes
1answer
19k views
Kerberos authentication: clock skew too great
When trying
kinit viesturs@SERVER.COM
I get
viesturs@SERVER.COM's Password:
kinit: krb5_get_init_creds: Clock skew too great
What to do?
Here is my timedatectl status
$ timedatectl status
...
1
vote
0answers
12k views
kerberos_kinit_password failed preauthentication failed
i'm using my ubuntu server to join in my windows domain, so i have my samba managed by my windows groups. Everything is working fine but every 3-5 days, i'm getting this error:
...
2
votes
0answers
399 views
Why can't I keep multiple Kerberos tickets
I currently want to ssh into two different realms. However, whenever I generate a ticket for 1 realm using pkinit, I lose the ticket I've generated for the other realm.
Why is this & how can I ...
0
votes
0answers
1k views
apt-get krb5-user unmet dependencies 1.14.3+dfsg-2ubuntu1?
I need to install krb5-user but I encounter the error below:
krb5-user : Depends: libkrb5-3 (= 1.14.3+dfsg-2) but
1.14.3+dfsg-2ubuntu1 is to be installed
I don't understand what does this mean ...
0
votes
2answers
8k views
mount cifs share on terminal fails (using password or kerberos krb5 ticket)
HOST: Kubuntu 16.04.3 LTS
LOCALHOST: Kubuntu 17.10
I'm not able anymore to mount a cifs share on a terminal:
mount -t cifs -o user=USER,domain=DOMAIN //HOST/share /mnt/tmp
Password for USER@//HOST/...
1
vote
1answer
2k views
Permission denied on mounted nfs folders
I'm trying to mount home directories over nfs on a few clients. Mounting works but I cannot cd /srv/nfs4: Permission denied. root can enter those mounted directories and read files there. Checking as ...
1
vote
0answers
320 views
Cannot change password for local account [duplicate]
I have a non-root, local account where I have been unable to use 'passwd' as user root to change that password. The system is an AWS instance running Ubuntu 14.04 bound to Active Directory using both ...
0
votes
1answer
1k views
How can I mount a Windows folder and enforce its NTFS permissions?
I have an existing Ubuntu server. Users already sign into it with AD credentials. The problem is that there is a mounted file share - in a Windows environment, the users only have access to folders ...
0
votes
0answers
1k views
Ubuntu 17.10 - Kerberos/SSSD AD User login only sometimes works
I am new here, so please advise me, if I did miss something about the rules here.
We are running a network of computers in a Windows Server 2016 AD domain.
In Ubuntu 16.04 we configured Ubuntu to ...
1
vote
0answers
660 views
AutoFS with Kerberos passing root UID instead of user UID at login, fails to mount
On a Ubuntu 16.04 test VM, I can automount my homedir (as CIFS in this example, NFSv4 behaves similarly), but only after I have already logged in. Apparently, autofs is passing UID=0 instead of my ...
0
votes
1answer
2k views
Trying to access kerberized NFS mount gives: 'ERROR: GSS-API: error in gss_acquire_cred()'
I have a kerberized NFS filesystem we're trying to access from an Ubuntu 16.04 client. The server is RHEL7. We can mount it successfully (as root):
mount -t nfs4 -o sec=krb5 colossal.ipa....
0
votes
1answer
1k views
pam / ad issue with lightdm
im having issues logging in the desktop via AD with my current setup with sssd, kerberos, samba, and AD. heres the output of the auth.log file. it seems that pam and lightdm aren't working well with ...
0
votes
0answers
2k views
Kadmin: Client not found
I'm attempting to join ubuntu 16.04 LTS to a windows AD. My goal is for this client machine to be able to log in with the Windows AD username and be able to access the Windows shares.
I started by ...
1
vote
0answers
2k views
SSSD ad authentication windows server 2012 R2
I want to login with AD users on a client with no gui. It is a Ubuntu 16.04 machine with SSSD. Active Directory server is Windows Server 2012 R2. I cannot login on console login with "aduser@srv.local"...
0
votes
1answer
3k views
Insufficient quota exists to complete the operation, net ads join
I'm trying to join Active Directory in Xubuntu 16.04 in a enterprise business enviroment so I'll change the name of my REALM by MY.EXAMPLE.CORP. My issue is: when I run
net ads join -U Administrator
...
3
votes
0answers
818 views
Forwarded kerberos tickets cached in /tmp instead of keyring
I'm using Ubuntu 14.04 and 16.04. They're configured to cache kerb tickets in the kernel keyring via this setting in the [libdefaults] section of /etc/krb5.conf:
default_ccache_name = KEYRING:...
3
votes
2answers
16k views
rdesktop, credSSP and kerberos
I have installed the program rdesktop with the command
sudo apt-get install rdesktop
I use rdesktop with the command
rdesktop -a 32 192.168.0.38
with the error message
Disconnected due to ...
2
votes
1answer
791 views
