Questions tagged [authentication]
Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.
776
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Unable to login to my remote osd ubuntu
When i am trying to login to my ubuntu i am getting message "Sorry, passwrord authentication failed" , but i've been using the same password for the past month, also i used the key "...
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41
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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 ...
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25
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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 ...
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49
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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&...
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37
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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 ...
- 103
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62
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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: ...
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1
answer
44
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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
...
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10
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Google Chrome stays locked after loging in with fingerprint?
Whenever I log in with my fingerprint sensor Google chrome stays locked and needs a password to gain access to my Google account.
And is there anyway to authenticate with fingerprint?
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1
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34
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Ubuntu authentication error login screen auto blinking?
I am working on Ubuntu that is launched from an Oracle virtual machine. While logging in it is showing an authentication error.
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89
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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 ...
- 174
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140
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Give access to specific Active Directory Groups and local users
I have a server which is connected to the active directory, everything works fine (at least I guess) and everyone can access the server with their AD credentials, but I wan only specific group to be ...
- 174
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33
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Permission denied (publickey) but the server is not using public key authentication
I just accidentally used ssh-keygen -R (ip address) but later i found the server authentication is not based on the public key authentication but just password authentication.
now when i type ssh ...
- 111
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128
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Ubuntu chrome remote desktop authentication super user
I tried to use google remote access to my Ubuntu computer for the first time in a while. When I try to turn on the chrome remote desktop to share my device, I get "An unknown error has occurred.&...
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1
answer
206
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Some Azure Active Directory users are not able to login to Ubuntu Machines
Some AD Users are not able to access Ubuntu machine in the domain, the error after trying to access the server via ssh I get in /var/log/auth.log:
Jun 14 11:50:36 SR sshd[1467842]: Invalid user ...
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238
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"sudo: unable to initialize PAM: Critical error - immediate abort" when try to run "sudo apt-get update" on Ubuntu 22.04
I am encountering an issue on my Ubuntu system when attempting to run the command sudo apt-get update. The terminal returns the following error message: sudo: unable to initialize PAM: Critical error -...
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458
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howdy is not working on ubuntu 23.04
I recently upgraded my system to Ubuntu 23.04. However, Howdy is not functioning properly on the lock screen or any other authentication process.
I attempted to reinstall it, but it did not solve the ...
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2
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1k
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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 ...
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1
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115
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How can I achieve automatic login to the nomachine web client without providing access credentials？
When I use the nomachine web client, I have to enter a user name and password each time, which is a tedious step for me. I have tried to modify files such as server.cfg, web.cfg and default.nxs ...
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94
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Ubuntu 22.04 does not remember MFA in my microsoft teams account
I'm using Ubuntu 22.04, and every time I connect to my teams account it asks me to do the double factor authentication (MFA). From the admin side, it is supposed to remember the MFA for 90 days and in ...
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413
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On Ubuntu 20.04, unable to ssh to server, after upgrade from 18.04
After upgrading ubuntu from 18.04 to 20.04, unable to connect to host with my user
Below are the logs from auth.log
Mar 28 12:27:13 tpvm sshd[1590]: debug1: userauth-request for user XXXXX service ssh-...
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1
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602
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Cannot connect to home WiFI - Repeated 'Authentication required'
Problem Description
I recently installed Ubuntu 22.04.2 LTS and I cannot connect to my home WiFi internet connection. Every time I click on my home's WiFi connection, it asks for the password, and ...
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41
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Authentication Pop-up Uninvited 22.04
My 22.04 installed on PC with no windows OS on the system. It's exclusively Ubuntu. For some reason the authentication pop-up window shows up at various times during the day. It doesn't make any ...
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86
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Cannot enroll same fingerprint for multiple users
I am using Ubuntu 22.04.2 LTS Desktop, fresh install. I want to have multiple accounts on Ubuntu machine for different contexts, but when I try to add the same fingerprint on the second user I get an ...
- 101
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1
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198
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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 ...
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1
answer
133
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Outdated and broken libpam-radius-auth package version in Ubuntu 22.04.x [duplicate]
The Ubuntu 22.04.x version of libpam is not working correctly for me. It does not allow user authentication with an active directory.
I have installed the package in its latest version, downloading ...
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0
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16
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Fingerprint association to username
I'm running 22.04.2 and I have a working fingerprint scanner associated with various user accounts.
What I would like is a login where upon scanning the fingerprint authenticates the user and ...
- 11
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0
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76
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Authentication Required popup blocked access to my laptop
I see this popup after reboot and it doesn't allow me to login into my laptop. Also I can't enter my password into the textbox.
- 121
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1
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419
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Screen lock error during upgrade to 22.04 from 20.04
yesterday, I've tried to upgrade from 20.04 to 22.04, accidentally I closed the laptop which I guess locked the screen. Now when I try to unlock it, I get an "Authentication Error" and I can'...
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93
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Access to remote server via SSH via pem key requests 2 set of password (key and user)
On a remote server, I would like to access via ssh only with a pem key, which is password protected, but I'm being asked for the user account password as well
I created the account which I want to use ...
- 147
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50
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NTLM authentication with CNTLM results in segfault
I try to pass authentication using
cntlm -H -M http://provider.com:9090
on Ubuntu 20.04
to get access to the internet via VPN.
But the cntlm gives me segfault errror.
Are there any solutions or an ...
1
vote
1
answer
2k
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wget using git credentials
How do I run wget or curl to download a single file from a Git repository which is already authenticated in Git?
It seems that I need to pass a private key or a public key, but I am already ...
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1
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170
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'who' command has blank output when using SSH
I have an Ubuntu virtual machine which I access via SSH. When I execute the who command I get nothing. Moreover I get this output when executing systemctl --user:
Failed to connect to bus: No such ...
- 183
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1
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215
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ssh 2fa not working but works when i sudo
I have a problem with the 2FA enabled on my linux.. I made all the required things that are needed to enable the 2FA but i 2FA is not working when i want to connect to the linux OS with ssh. I made ...
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2k
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How to fix : Unable to install xxxxx: authentication was required
Running 22.04.1 I was running constantly with an issue with the snap-store unable to refrsh, so I followed instructions to kill and refresh the store from the command line.
Since a few days, I can no ...
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1
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83
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How to get GNOME to stop asking for a password everytime I insert a dvd
Hello I set up a ubuntu server (22.04.1) with plex running and gnome (42.4)
This is working really well. However, everytime I put a dvd in, it asks me for a password. it is driving me crazy. The ...
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1
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6k
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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
...
- 241
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691
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Squid Proxy - Error 407 - Simple Authentication NCSA
when running squid (4.10, installed from apt or 5.6 from docker ubuntu/squid:latest) and adding a simple user authentication, all requests are dropped by squid with HTTP 407. The purpose is to have a ...
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51
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How do I close the redundant "authentication required" dialog visible in the corner?
How do I close the redundant "authentication required" dialog visible in the corner?
The way to make this dialog appear is to...
have a laptop monitor on the right and an external monitor ...
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87
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package manager problem ubuntu 22.10
After installation of Ubuntu 22.10, Synaptic Package Manager cannot start because authentication fails. Password was cleared after installation of previous version, so no password was previous ...
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1
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0
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305
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Seems 2FA login authentication is trivial to bypass on Ubuntu. What am I missing?
I was considering setting up 2FA on Ubuntu with libpam-google-authenticator as outlined in this article. However, it seems this method can be completely bypassed by entering GRUB rescue mode and ...
- 43
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0
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619
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Ubuntu is asking for authentication when booting and before login
Ubuntu is asking for user and password authentication before user's login. It asks when the Acer logo and Ubuntu logo still appear. After inputing a random username and password, it will bring me to ...
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227
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Require password for LXC container shell access
I'm trying to lockdown shell access to the containers I'm running. In essensse, if someone is on the LXC host computer, I would like for them to have to enter a username/password before they get shell ...
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718
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Is there a way to stop the authentication prompts especially for Wi-Fi scans in settings?
OS: Ubuntu Desktop 22.04 LTS
Accessing the settings on Ubuntu is giving me PTSD as whenever I seek to change anything, the first thing that has to pop up is Authentication required for Wifi scan.
You ...
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180
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ldap_sasl_interactive_bind problem with ldapsearch
LDAP clients has some problem.
ldapsearch -X -h server.site.tld params
ldap_sasl_interactive_bind: Unknown authentication method (-6)
additional info: SASL(-4): no mechanism available: No worthy ...
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12
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1
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5k
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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 FIO alliance have released a standard for passkeys. Apple have announced support fo passkeys on iOS 16 and macOS with Safari 16.1, ...
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1
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524
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X2Go Public Key Authentication not working in Ubuntu 22.04
Software Versions:
X2Go Client 4.1.1.1
Ubuntu 22.04
I've been using X2Go on AWS for a couple years. X2Go client is installed on my workspace, and I run the server on EC2 instances to allow graphics. ...
- 29
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0
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3k
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"password authentication didn't work" Can't get past login
So I installed Ubuntu 22.04.1 on my laptop (a legion 5 pro) using VirtualBox. While installing at the part where it asks if we want to Erase disk and install Ubuntu (the option selected) i proceeded ...
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0
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303
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Shut Down Authentication Required Due To Application Inhibiting - Then Stalled At Start-Up
Ubuntu 20.04.5 Desktop
I never before observed this authentication required notice for powering off my laptop on Ubuntu. But now I get it every time I shut down the system . . .
Here are the current ...
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70
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"Not authorized to perform operation" accesing to a flash drive when logged in Kubuntu 22.04 only with numeric usernames of our LDAP
I've configured Kubuntu 22.04 with pam-ldap following:
https://help.ubuntu.com/community/LDAPClientAuthentication
After configuring ldap authentication, if I login in with a text username like "...
- 31
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939
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Ubuntu server 22.04 TACACS+ authentication to Cisco ISE not working
I know there are already similar and quite old questions and maybe using tacacs+ is not state of the art but I need to authenticate users on my Ubuntu 22.04 server to a Cisco ISE using the TACACS+ ...
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