Questions tagged [authentication]
Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.
792
questions
-1
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0
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34
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Kerberos install on Ubuntu
I am trying install kerborose priciple in my new VM, but when I do:
sudo apt-get install krb5-user
it starts with
Setting up krb5-config (2.6+nmu1ubuntu1) ...
but no activity is happening. Can ...
1
vote
2
answers
3k
views
Need help on google authenticator on ubuntu
I have Ubuntu 20.04.3 LTS where I have successfully installed Google authenticator for MFA authentication, now I need a help on the steps of authentication, my goal is this:
If a user has no ssh-key ...
0
votes
2
answers
902
views
Ubuntu Problems with Pam Google Auth
I had a working OpenVPN server that used Google Authenticator for TFA. It was working perfectly fine for well over a year. Just last night/today it stopped working. I managed to track down the auth....
26
votes
2
answers
12k
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Does Ubuntu support passkeys, like Apple, Google and Microsoft do?
Passkeys are a new feature that is being supported more and more. The FIDO alliance released a standard for passkeys. Apple announced support for passkeys on iOS 16 and macOS with Safari 16.1, Google ...
0
votes
1
answer
39
views
Unable to connect to my vps through ssh using PublicKeys
I'm new to system administration and I am trying to setup (/secure) my first VPS. To my understanding using Keys are "safer" than using passwords, so here I am trying to do just that.
I've ...
0
votes
0
answers
38
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Wifi stopped getting connected in Ubuntu 20.04
My Ubuntu 20.04 was working all fine, but all of a sudden I am not able to connect to my wifi as it is keeps on asking me for the wifi password again and again.
I tried to remove the wifi password in ...
1
vote
1
answer
764
views
Using SSH authentication configurations for xrdp
I have a server where its ssh is configured to allow some users and groups from AD, and the configuration is done in /etc/pam.d/sshd.
However, this configuration is only applied to ssh, and if someone ...
1
vote
1
answer
2k
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LDAP authentication on Ubuntu 18.04
context
I'm trying to configure LDAP authentication on an Ubuntu 18.04 machine.
steps to reproduce
In order to do that, I followed the following steps:
apt install sssd libpam-sss libnss-sss
create ...
0
votes
0
answers
66
views
Shibboleth configuration in ubuntu 22.04
Does anyone know how to install and configure Shibboleth in Ubuntu 22.04? Any recently updated documentation will be much appreciated.
0
votes
0
answers
45
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unable to login root after cis hardening
after i follow cis 5.4.2 Ensure lockout for failed password attempts is configured to configure faillock and after reboot i unable to login root or other account.
this is my conf
# /etc/pam.d/common-...
0
votes
0
answers
25
views
How to Login to SSH with Dynamic username
I some external Gateway through which the ssh requests come and need to log the sessionID in the linux when the connection happens. I can send the sessionID (some string) along with the username while ...
0
votes
0
answers
69
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Allow access to openssh server without authentication
First this is not a duplicate of any thread ive gone thru all of them and either solutions were not working for OPs or they werent working for me.
I want to allow specific user to use my ssh server ...
0
votes
0
answers
36
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How to enable TLS1.3 for wifi connection in ubantu
I am using Ubuntu 22.04.4 LTS (jammy), I want to connect access point of wifi network where authentication method is TLS enable. By default connection handsake initiated with EAP_TLS1.2, I want to ...
3
votes
1
answer
7k
views
DigitalOcean droplet root password not accepted for client, but works for console
I have an Ubuntu 14.04 droplet with PubkeyAuthentication set to yes and PermitRootLogin set to no. Since I created it, my pubkey has worked fine. For some unknown reason today it's not accepting my ...
0
votes
0
answers
16
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one portal to authenticate different applications
I have installed ojs, koha, dspace7 and moodle succesfully on ubuntu 20.04 and I need to use one portal to authenticate the login to all these service, any guide or technical reference I can rely on ...
0
votes
2
answers
9k
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su without password with pam su-authentication
I've done the following configuration in ubuntu 14.04 but it's still asking password.
$ /etc/passwd
test:x:1004:1004::/home/test:/bin/bash
$/etc/pam.d/su
auth required pam_wheel.so group=...
4
votes
1
answer
8k
views
What causes “pam_unix … conversation failed” in auth.log
There are thousands of entries in my auth.log like this:
sudo: pam_unix(sudo:auth): conversation failed
What causes these to occur? I'd like to fix whatever it is but I'm a bit mystified as to where ...
0
votes
1
answer
5k
views
How to install OpenVPN with 2-factor authentication?
I've installed OpenVPN over Ubuntu 16.4.2, and I'm trying to add 2-factor authentication using Google Authenticator.
Does someone've got a manual or some kind of user guide how to do that ?
Thanks,
...
3
votes
1
answer
5k
views
Cannot get authorization to run pg_dumpall
All I am trying to do is backup my existing database cluster in order to upgrade from Postgresql 9.4.8 to 9.5. I am on Ubuntu 16.04.
I am aware of this post: Postgres password authentication fails. ...
1
vote
1
answer
4k
views
ssh connection fails with and without rsa keys
I've got a machine running Ubuntu in the office.I've got a machine running Mint at home.
My goal is to be able to work from home connecting to the office with ssh.
I swear i tried to look for similar ...
1
vote
1
answer
4k
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Connection closed by 127.0.0.1 port 45030 [preauth]
Connection closed by 127.0.0.1 port 45030 [preauth]
Nov 9 17:40:01 swi007 sshd[17716]: Connection closed by 127.0.0.1 port 45032 [preauth]
Nov 9 17:42:30 swi007 sshd[17840]: Connection closed by 127....
0
votes
1
answer
4k
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Ubuntu Server 16.04 and Active Directory
I've been following the “SSSD and Active Directory” documentation in order to try and add an Ubuntu Server to our Windows AD domain for user authentication.
Configuration goes well until the point at ...
0
votes
0
answers
65
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Unable to join and authenticate ubuntu server with AD domain
We have followed up with the steps in the below ubuntu site to configure and join ubuntu server with windows AD domain.
https://ubuntu.com/server/docs/service-sssd-ad
Post completion of steps we are ...
11
votes
3
answers
20k
views
"Authentication required. System policy prevents WiFi scans" in FocalFossa
For those of you bothered by the deluge of annoying popups asking to authenticate pretty much every move one makes in Focal Fossa ("System policy prevents this and that" when mucking about ...
6
votes
3
answers
27k
views
RSA keys not authenticating
Just trying to get a basic setup of openSSH going on an Ubuntu box to work remotely. Main issue: RSA keys fail auth. ssh DOES work using the password for auth, but I would much rather limit it to only ...
4
votes
0
answers
9k
views
How to use Fingerprint for login in Ubuntu 22.04?
I am currently using ubuntu 22.04 Jammy Jellyfish and I have the following fingerprint reader in my laptop
Bus 001 Device 006: ID 27c6:5301 Shenzhen Goodix Technology Co.,Ltd. Fingerprint Reader
I ...
0
votes
1
answer
5k
views
Deepin Software Centre unable to aunthenticate password
I am using Kubuntu 11.10. I tried installing Deepin Software Centre in it. Installation was successful but when I launched the application it asked for password. Every time I entered the password, it ...
0
votes
1
answer
229
views
wifi authentication required
On my dual boot system, Windows10+Ubuntu 22.04, wifi works in Windows, but not in Ubuntu. It keeps telling "authentication required", even though I entered the right Wireless Key.
I have a ...
0
votes
0
answers
81
views
22.04 update manager hangs waiting for authorization
This used to work on this system, now it doesn't.
Ubuntu 22.04
When I run the gnome update-manager tool (aka Software Update), it hangs waiting for authorization. I am in the sudo group. In the past,...
0
votes
0
answers
225
views
SSSD Configuration to Authenticate a one-way trusted domain user
I have a Microsoft "REDFOREST" Active Directory Deployment. I have my REDFOREST domain with all my user accounts. I have my "RESOURCE" domains that have a one-way trust of the ...
12
votes
1
answer
13k
views
Unable to disable password authentication over SSH
I configured login by SSH key which is working but I can still login by password, which I don't want.
I used sudo nano /etc/ssh/sshd_config to make the following changes:
PasswordAuthentication no
...
2
votes
4
answers
3k
views
Missing OAuth2 Authentication Option Thunderbird 102.10.0
I recently switched my Windows laptop over to Ubuntu 22.04, and I am trying to get Thunderbird working. The email I use is a University email, and they use Microsoft's servers (office365) and OAuth2 ...
0
votes
1
answer
323
views
send_pubkey_test: no mutual signature algorithm
Here is the client log output after a ssh -vvv user@machine (I think this problem is related with the deprecation of sha-1). I have already tried to create a new key/par for ed25519, but it doesn't ...
2
votes
1
answer
830
views
Evolution will not connect with gmail. Errors are "Failed to authenticate: timeout was reached" and "password not available"
I am trying to use the Evolution mail client and it is not connecting to Gmail. This used to work, I have thousands of messages in evolution.
I am using the server imap.gmail.com, port 993. I have ...
0
votes
0
answers
105
views
Cannot make Active Directory offline connection persistent
After several weeks of tries and failure, I finally need to ask for help.
For starters, I use Ubuntu 22.04 LTS, that I have setup with winbind, PAM, Kerberos.
Overall, I am trying to make a ...
1
vote
0
answers
150
views
Password Authentication Issue SSH - Cannot disable
I've just installed Ubuntu 22.04.3 LTS.
Set up SSH as I have done for years.
In /etc/ssh/ssh_config changed:
PasswordAuthentication no
PubkeyAuthentication yes
ChallengeResponseAuthentication no
...
0
votes
0
answers
33
views
Deja-dup asks for administrator authentication
I am using Ubuntu 20.04 LTS, installed and managed by my workplace.
I have set up backup on my home folder only, each day.
Regardless, an authentication dialogue is opened each time:
"...
3
votes
6
answers
33k
views
How to log in to MySQL shell when the user has no password?
I got this error:
root@sys3026:/home/sys3026# mysql --user=root --password
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
Any one please ...
6
votes
2
answers
25k
views
SSH with LDAP authentication (ActiveDirectory) and ssh keys stored in AD
Environment : Ubuntu 14.04 & 16.04 Servers, Active Directory on Windows Server 2016, Ubuntu 14.04 & 16.04 clients. Ubuntu servers and clients are not on the domain.
Hello everyone,
I'm a ...
0
votes
0
answers
1k
views
How to force SSH keys on Ubuntu 22.04 and disable password authentication
I have seen quite a few posts on SSH, but the solution there seem to be not working for me.
I have generated a SSH key on my local Fedora machine using the ssh-keygen command. I then copied the ...
0
votes
0
answers
24
views
Unable to login to my remote OSD Ubuntu
When I am trying to login to my Ubuntu I am getting message Sorry, password authentication failed. But I've been using the same password for the past month, also I used the key Right Ctrl+F5 in OSD ...
4
votes
1
answer
12k
views
AUTHENTICATION REQUIRED: An application wants access to the keyring "Default Keyring", but it is locked. Can I disable this?
enter image description here
AUTHENTICATION REQUIRED: An application wants access to the keyring "Default Keyring", but it is locked. Can I disable this? It keeps popping u
1
vote
2
answers
1k
views
APT-GET behind a proxy with DIGEST Authentication
I've edited apt.conf, applied "system wide configuration", edited /etc/enviroment, etc... but out of luck.
My company is running a Squid proxy with DIGEST authentication, which I think APT doesn't ...
0
votes
0
answers
1k
views
Ubuntu 22.04 stuck in login loop on GUI login
I am experiencing a persistent login loop issue on my Ubuntu 22.04 machine. Every time I attempt to log in, the screen blacks out briefly and then returns to the login screen.
Before the issue ...
0
votes
0
answers
396
views
Which CA Certificate to use when installing Ubuntu 22.04 from a USB?
I made a bootable USB drive today on Windows, and I am in the process of installing Ubuntu 22.04 on a Windows desktop. One of the first steps in the Ubuntu installation setup is to connect the ...
0
votes
0
answers
348
views
VPN connection in Ubuntu 22.04 throws "MS-CHAP authentication failed"
I have Ubuntu 22.04 and a VPN that allows me to work within the servers of the company I work for. Everything worked well until today.
Now, when I try to connect, it says "Authentication failed&...
0
votes
0
answers
473
views
802.1x wired authentication: How to make NetworkManager ask for identity every time?
I want networkmanager to ask for identity/username every time I connect to the wired network, how can I make this happen?
My current configuration is:
802.1x Security: enabled
Authentication: ...
0
votes
1
answer
951
views
Can't setup fingerprint authentication on HP ENVY x360
Currently running Ubuntu 22.04.2* LTS.
Clearly there's a fingerprint device on my machine:
Bus 003 Device 003: ID 04f3:0c4c Elan Microelectronics Corp. ELAN:ARM-M4
And after I run the command:
sudo ...
0
votes
0
answers
50
views
Random print before login after restarting in Ubuntu from Windows on a dual-boot
It does not make too much sense, but this just happened.
As the title says I have a dual-boot, Windows 10 - Ubuntu 22 laptop. I have restarted the system (actually switched the operating system from ...
0
votes
1
answer
247
views
Fail2ban sshd rule is active but not working!
I used ubuntu 22.04 TLS.
sshd_config:
Port 9401
SyslogFacility AUTH
LogLevel VERBOSE
MaxAuthTries 3
/etc/fail2ban/jail.local:
[ssh-9401]
enabled = true
filter = sshd
logpath = /var/log/auth.log
...