Use this tag for questions relating to authentication mechanism (i.e. proving to the system that you are you, using passwords, keycards etc.). In general don't use this and the security tag on the same question, unless it is about the security of the authentication process.

learn more… | top users | synonyms

0
votes
1answer
161 views

Enable sssd caching and linux to honor that cache on CentOS 5

I wanted to enable sssd caching on CentOs and not to use nscd caching, because sssd itself is giving that option. However, authconfig is not giving the option for --enablecachecreds even on the ...
4
votes
2answers
58 views

Understand the PasswordAuthentication in sshd configuration

I have an OpenSSH server which supports only password authentication: [martin@ ~]$ ssh -v 10.10.1.183 -l root OpenSSH_5.2p1 FreeBSD-20090522, OpenSSL 0.9.8k 25 Mar 2009 debug1: Reading configuration ...
3
votes
1answer
86 views

How to log messages from a pam module?

The problem I am trying to solve is that I want to know if a certain PAM config file is being used or not. The latest version of IBM MQ (V8) provides a PAM file /etc/pam.d/ibmmq. We're ...
0
votes
0answers
36 views

GUI Authentication Requiring a Different User Auth

A few weeks ago a colleague signed into my Fedora 22 workstation. He too is a group admin. Ever since then whenever I attempt to install or unlock the "Authentication Required" modal requires his ...
0
votes
1answer
209 views

Valid root/user passwords not working on EC2

There is an authentication failure when I'm trying to enter password for any of my accounts after an update using yum. My authentication got broken, while everything else works. The updates were ...
7
votes
4answers
2k views

Is the username in Unix case sensitive?

Is ssh abc@servername different from ssh Abc@servername? Does the case of the username matter in Unix? My user authenticates via LDAP.
2
votes
4answers
200 views

Authentication failure on Amazon Linux

There is an authentication failure when I'm trying to enter password for any of my accounts. I am logged in using ssh to my AWS EC2 instance. After a while I checked the privileges to files that ...
1
vote
1answer
220 views

Dogtag CA after installation

After Dogtag 10 installation(step by step by https://www.youtube.com/watch?v=C3eElJAz7lU) when I open Admin (https://localhost.localdomain:8443/ca/agent/ca/) I get following error Problem ...
1
vote
1answer
237 views

Sendmail issues “530 Authentication required” error message when authinfo is supplied

sender_email - email address that does not exist, but must be used as FROM address, because receiver host rejects emails from other emails. receiver_email - email that is supposed to receive the sent ...
0
votes
1answer
73 views

Linux: root filesystem via network (with authentication)

I try to create a linux computer which loads its root filesystem from the network. This currently works with NFS, but unfortunately it is not very secure. The network is just a home network, which ...
1
vote
0answers
2k views

Adding CentOS 7 to Active Directory

I am having a hard time adding a CentOS 7 machine to my domain (Active Directory 2012 running in Windows 2008 mode). I am using realmd to join the machine to the domain. Here is what I have checked so ...
3
votes
2answers
117 views

Why user without any PASSWD entry in sudo config has to authenticate every time?

Consider this sudo config for two users: mary ALL = (ALL) NOPASSWD: /bin/ls, /bin/cat bob ALL = (ALL) PASSWD: /bin/sort Now, when user mary executes any command not in the list she has to ...
1
vote
1answer
45 views

persisting multi-factor user data for custom pam authentication in CentOS 7

I am designing n-factor authentication for CentOS 7 using a custom PAM module. When the user tries to SSH, they will be texted a pin code, and be prompted to enter the pin. Where should I store the ...
3
votes
2answers
1k views

How to stop sudo PAM messages in auth.log for a specific user?

I am using Zabbix for monitoring my environment and zabbix_agentd executes as user zabbix one custom script every 60 seconds; it uses sudo to run this script as root. In /var/log/auth.log I see every ...
1
vote
1answer
215 views

Installing Kali 2.0 on virtual box failled

I'm using VirtualBox 4.3.22 and I'm trying to install Kali 2.0. After the installation progress is complete and I reboot, I have to enter my username and password as usual, e.g username newbie; ...
2
votes
1answer
411 views

n-factor SSH authentication for CentOS 7

How can I enable (and require) n-factor authentication for all SSH connections to a CentOS 7 server? I have read about Google Authenticator, which provides two factor authentication. But that is ...
8
votes
1answer
129 views

How to add additional steps to login?

What I would like to achieve is an interactive program that runs either before or after asking the user for the password, but won't handle over the access to the computer unless it exited with success....
1
vote
1answer
58 views

Mutt authentication fails because username string is malformed

I'm trying to set up mutt to work with our internal email server. Our user names have the form user@domain.lan But when mutt tries to authenticate, it appends the mail server's url to the username ...
0
votes
1answer
440 views

Apache behind proxy: bypass Auth Basic for some ip

I need bypass basic auth to some ip, Apache is 2.4 and is behind haproxy, i have inserti this into Document Root section: <Directory /path/to/webroot> AuthUserFile /etc/apache2/.htpasswd ...
0
votes
0answers
36 views

Polkit Accepting Nothing

Today I switched from Windows to Fedora 21--Fermi Linux using KDE specifically--and I have a fair knowledge of how to do navigate my way around and install things via command line, but when it's ...
0
votes
0answers
107 views

Webmin: Cannot login through nginx reverse proxy

I've created a reverse proxy for webmin through nginx to run webmin at [site domain]/webmin instead of port 10000 ([site domain]:10000). When I go to [site domain]/webmin, the login page shows up as ...
4
votes
2answers
459 views

Disabling ssh password authentication does not work on my debian VPS

I have a Debian 7 VPS setup. I just enabled SSH Key authentication and disabled password authentication but the disabling did not work. When I attempt to SSH into my VPS, it prompts me for my SSH Key ...
1
vote
2answers
1k views

Cent OS 6.6 enable Plaintext authentication on dovecot and postfix

A customer of mine wants to use gmail as their default mail client but I have rolled forward to a new CENTOS server version (6.6, ok it's not "new" new) and the dovecot and postfix settings are ...
1
vote
0answers
32 views

Authentication shared over multiple systems [closed]

TL;DR I'm looking for a software that allows authentication shared over multiple systems to be used for authorizing access to all devices connected to a network. Any advice, recommendation inclusive ...
0
votes
1answer
77 views

ssh-copy-id doesn't copy to non-default location

Does ssh-copy-id recognize if the authorized_keys file is not in ~/.ssh? I am storing my authorized keys file in a different folder, which I have configured as: AuthorizedKeysFile /mnt/sd_ext/.ssh/...
2
votes
1answer
3k views

Setting up connection to WPA2 Enterprise (PEAP/MSCHAPv2) with two-level certificate

For a long time, I have been able to use NetworkManager + wpa_supplicant as configured in Debian 7 to connect to a secure wireless at work (which is WPA2 Enterprise, with PEAP + MSCHAPv2 ...
1
vote
0answers
143 views

firefox 38 hanging with corporate proxy and winbind?

I seem to have broken firefox 38 and it is unusable. It just hangs and freezes for long periods of time ranging from a few seconds up to infinity - usually in steps at the authentication prompt for ...
0
votes
1answer
206 views

Linux Mint, is there a captive-portal software for?

Does Linux Mint 17+ has a software for doing captive portal? Amongst the provided list here, it seems none is mint-compatible.
1
vote
0answers
202 views

When connecting my WiFi, how to open browser automatically?

I made my Linux computer providing WiFi access. This is only to browse its local website. As one does for a captive portal, I want to force the browser to display and direct to my homepage : - you ...
1
vote
0answers
232 views

Captive portal detection, popup implementation?

Based on hostapd, I m building a captive portal. - My Linux Machine provides a Wifi access. - iPad's and Android clients-tablets connect this Wifi. Generally, any client OS check if a url is ...
0
votes
1answer
250 views

Open a webpage and enter a username and password via CLI

Ultimately, I want to use a bash script to automatically open and log into a website. I was wondering if I could use the curl or elinks commands to log in to a website and then somehow export that ...
0
votes
1answer
36 views

Install script - sudo authorisation compatibility?

I am currently updating a few scripts, and am planning on releasing some useful ones so others can use them (so they need to work across a wide range of machines without crashing, and without breaking ...
2
votes
2answers
149 views

Add a user wthout password but with SSH and public key

I want to add a user to Red Hat Linux that will not use a password for logging in, but instead use a public key for ssh. This would be on the command line.
0
votes
3answers
371 views

Get MAC of a client request?

I have a network with 20 raspberries (clients) and 1 server. I'd like to check MAC of client request, is that possible ? Further, possible without being known (nor visible) by the client ? NB : I ...
1
vote
2answers
498 views

Unable to login with SSH-RSA key

This post is following this question : Authentication refused: bad ownership or modes for file /var/git/.ssh/authorized_keys . The issue as exposed there is solved (about files modes of the ....
5
votes
3answers
9k views

Authentication refused: bad ownership or modes for file /var/git/.ssh/authorized_keys [duplicate]

EDIT The issue as exposed here is solved (about files modes of the .ssh folder. But an other issue persists so I create a new question : > Unable to login with SSH-RSA key I can no longer ...
3
votes
0answers
342 views

Wifi with WPA2-EAP MS-CHAPv2 authentication (username and password) during Debian installation

I am currently attempting to install Debian on my laptop computer. During the network configuration stage, I am prompted to "enter a passphrase for WPA/WPA2 PSK authentication". Unfortunately, I am on ...
0
votes
1answer
594 views

is iptables broken on my raspberry-pi? how to fix?

I am getting some person(s) trying to brute force my ssh, from multiple ip addresses (small sample) : May 22 19:50:02 rpi sshd[1272]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=...
2
votes
1answer
57 views

Configure OpenSSH server not to require password *or* key for a particular user

For the purpose of a training session, I'd like to make it possible for a particular user to connect without requiring a password or key-based authentication. I do not know the IPs or other data of ...
-1
votes
1answer
120 views

How can i get out of the authentication screen and shutdown? [closed]

I decided to install linux ,dualbooted, on my laptop but ran in some issues . I installed several corrupt installs causing me to allocate most of my harddrive ,at least the parts that do not contain ...
1
vote
1answer
825 views

Simple Radius authentication

I'm looking into using Radius as an authentication server for a few Ubuntu servers when accessing through SSH. I have tried using libpam-radius-auth but it doesn't work quite as I need. My goal is to ...
0
votes
1answer
690 views

what does pam_env.so really do?

Having the following line: auth required pam_env.so Documentation happily says "This module is required—it must run successfully for authentication to proceed." (https://www....
0
votes
0answers
269 views

ldap user on samba share

I have two servers: one is ldap and the other is samba. I have an existing user on the ldap server for an ldap client. Now I want to use this user account with samba to give share access permissions ...
1
vote
3answers
703 views

Why is gksu asking me for root password and not my password?

On one of my systems, I'm running Gentoo Linux and I've installed x11-libs/gksu-2.0.2-r1. I've disabled the root account using sudo passwd -dl root and I want to be able to run GUI apps which need ...
0
votes
0answers
262 views

Configure ldap client without yast

I'm configuring an LDAP client in a large number of Suse servers. The only way that I know to do this is using Yast, and this way is slow. I can't find another way. Anyone know another way to do this?...
2
votes
1answer
1k views

CUPS not working correctly after Debian Wheezy -> Jessie upgrade because of a faulty libpam

I just upgraded a Debian Wheezy to Jessie, by changing the /etc/apt/sources.lst. If important: I pinned systemd to stay with sysvinit, and after the upgrade I removed the pin. If I now do apt-get ...
0
votes
1answer
123 views

Mixing authentication types in Apache

Currently, I'm using Apache to host my project repos (mercurial) and use Kerberos auth for users to push. The same Kerberos password is used to log in through SSH and there is a LDAP backend for user ...
10
votes
1answer
2k views

D-Bus authentication and authorization

I'm trying to set up remote access to D-Bus, and I don't understand how authentication and authorization are (not) working. I have a D-Bus server listening on an abstract socket. $ echo $...
2
votes
1answer
60 views

Directory Server doing lookups on one ldap server and authintication on another ldap server

I have an old Centos Directory Server and a new 389 Directory Server. I don't want to use sssd at the moment so lets keep that suggestion off the table. I do the following my RHEL 6.4 servers: ...
3
votes
2answers
356 views

Why does my SD card need authentication to access?

I'm running Ubuntu 14.04 on a Toshiba Chromebook 2 via crouton. I recently reformatted a 256GB SD card that I keep in my chromebook at all times. My problem is that every time I try to access my SD ...