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
118 views

Authentication failure for FTP server [duplicate]

I followed this link to install ftp server. And also added ftp user(ftpuser) and also added ftp password(1234567). But when I am using this password in any wordpress site or any ftp software such as ...
3
votes
1answer
435 views

mod_authnz_ldap bind as authenticating user instead of anonymously

I'm attempting to move as close to single credential as possible. We have a web application that has a fairly limited set of available authentication mechanisms but will (luckily) allow admins to tell ...
0
votes
1answer
260 views

Apache mod_auth_kerb: “Key table entry not found”

I want to use the Apache Module "mod_auth_kerb" to implement SSO for a Webapplication. With the following config: <VirtualHost 10.5.3.200:443> #Proxy <Proxy *> Order deny,allow Allow ...
5
votes
1answer
306 views

Command line printing with a Samba printer requiring authentication

Is there a way to print to a Samba printer requiring authentication by providing the credentials on the command line (e.g., with lpr)? I managed to store the credentials in GNOME Keyring and when I ...
0
votes
2answers
65 views

How to set Linux to ask for authentication when running potentially dangerous commands?

I've faced times when I accidentally ran dangerous commands and lost all my data. How do I set Linux to ask for current user password or root user password when running potentially dangerous commands ...
3
votes
2answers
4k views

Using curl to access basic auth protected website via proxy (polipo)

I am trying to download a file protected via basic auth: curl "http://User:Pass@example.com/blub/bla.bin" This is working fine. As soon as I tell curl to use my locally installed polipo it fails: ...
2
votes
1answer
352 views

Gnome-shell authentication dialogue fails, how to debug which app is using it?

I am using ubuntu 13.10 with gnome shell 3.8.4. I used to use gnome online accounts for empathy and other things, but then I stopped using them. And then gnome shell started to show authentication ...
0
votes
2answers
73 views

In Fedora 17 kde I don't know user or password to authenticate printer installation

I am trying to set up a new computer with Fedora 17 and KDE both working ok. I have plugged in an HP laser USB printer, and am trying to set it up. I enter "system settings -> printers" from the KDE ...
5
votes
2answers
3k views

Lenovo T440s Fingerprint reader in Fedora 20

I just got my new Lenovo T440s and installed Fedora 20 with Gnome 3 on it. Everything runs smoothly, except for the fingerprint reader. Its got a Validity VFS5011 (138a:0017) device which is not yet ...
8
votes
3answers
217 views

Trap: can't su as root, can't change group to wheel, ssh as root prohibited

Is this a trap? I made these steps in FreeBSD 10: 1) ssh as root prohibited 2) logged as user 3) su as root 4) as root chsh changed name of user "user" to "luser" 5) exit from ...
10
votes
2answers
8k views

I Can't login as root with su command, but I can with SSH

How is it possible that I cannot log in as root by su root or su (I get incorrect password error), but I can log in by ssh root@localhost or ssh root@my_local_IP with the same password? I'm using ...
0
votes
2answers
2k views

vsftp user authentication problems

I configured my ftp user's home dir to /var/www and set a password but I cannot login with ftp 127.0.0.1, it keep giving me 530 Login incorrect. Why is this? I'm sure I have typed the password right. ...
2
votes
0answers
606 views

Enter user authentication details for a printer?

I have a printer which is configured using the correct drivers. However, the printer requires user authentication (i.e. a username and password) to print. Where are authentication details usually ...
2
votes
0answers
263 views

Is there an alternative to OpenLDAP / Kerberos? [closed]

Are there ways to do centralized secure network-based authentication & authorization and user management that aren't OpenLDAP and Kerberos? Frankly, Kerberos is a nightmare to configure, leaving ...
0
votes
1answer
2k views

How to configure Samba to use Windows's login ID?

I'm trying to access the Linux share folder from Windows using Windows's domain authentication. I come across the integration of Windows Active Directory into Samba on a Linux box, thus I have this ...
1
vote
2answers
143 views

Is there any shared filesystem based on public key authentication?

I normally use NFS, however I am not so comfortable with the security as basically a root user can just change his UID to an arbitrarily one in order to obtain access to a shared folder. Moreover, ...
3
votes
2answers
509 views

Allow user1 to “su - user2” without password

I need to allow user martin to switch to user martin-test without password su - martin-test I think this can be configured in /etc/pam.d/su. There are already some lines in that file which can be ...
2
votes
1answer
382 views

How do I reset RHEL6 to autocreate home directory upon login?

I am using a RHEL6 host that is set up using LDAP for authenication. Upon first login it is supposed to create the home directory for the user (e.g. /home/gisle where gisle is my login username). I ...
0
votes
3answers
502 views

SSH public key authentication works on LAN and not from WAN

I've setup my SSH server to use public key authentication. When I connect to my server on local network, it authenticates. But it doesn't when I connect over the internet. I don't think the problem ...
0
votes
2answers
131 views

Ssh 'access denied' from one host but not the other

Consider the following scenario: I have a Debian-ssh-server setup and exposed it to the internet for some time for testing. Also I have an account which is basically configured as root in the sudoers ...
2
votes
0answers
181 views

SSH login from external authentication

Here is what I try to accomplish: I have a server with a git repository. I use ISPConfig as control panel for our websites and I want to integrate the ISPConfig API for email authentication as second ...
1
vote
1answer
241 views

How do I impersonate a windows domain account user from a linux process?

I'm running a process on a Unix box (I think it's a recent version of Red Hat, I can check for more detailed info if relevant), under a local user. I would like to access some network resources, via ...
2
votes
1answer
819 views

tinyproxy with user authentification

Does anybody have a solution that'll make tinyproxy work with user authentification like pam_auth at the squid proxy? I don't want to create a SSH-Tunnel and allow only localhost.
1
vote
1answer
183 views

Mount home partition on user login

I got a VPS with a user dedicated to store my files. As i am aware of the current situation with the NSA and many other governments, and my VPS is hosted on a doubtful country i would like to ensure ...
0
votes
1answer
874 views

Setting up the superuser password for the first time

How can I set up the super user password for the first time in Zorin OS, since the installer didn't ask me to provide one. I have experience with Fedora and openSUSE, but they asked me for the ...
5
votes
2answers
142 views

PAM - required and sufficient control flag

I'm studying PAM, and I'm a bit clueless about the meaning of some combination of control flags. From the Red Hat documentation we have: *required failure of such a PAM will ultimately lead to the ...
2
votes
3answers
823 views

How to do svn update without password on crontab [closed]

I'm new to svn and ssh. I'm trying to do svn update of 5 repositories in my local system every 3 hours on crontab. So, to achieve this I have setup ssh passwordless login using the below steps: ...
2
votes
0answers
1k views

WBC_ERR_DOMAIN_NOT_FOUND only for a specific account

Platform: RHEL 5.10 Version: Samba 3.6.6-0.136 Only on a single VM, one of my co-workers is able to log into the VM using his AD credentials without issue, whereas my account appears to have trouble ...
3
votes
1answer
215 views

Invoking PolicyKit/polkit via xinit/startx?

I recently upgraded a minimal installation of Ubuntu (with no full-fledged DE) from precise to saucy and since doing so I'm no longer able to mount removable drives as a normal user. I googled a bit ...
3
votes
2answers
125 views

SSH when to use public key and password?

I think I understand the difference between Public Key authentication and Password. But how do I decide which one to use and which one is most secure in what situation? Can anybody give me some real ...
1
vote
1answer
112 views

How to recover from this NIS & NFS client error?

I have a centralized NIS and NFS server on my server. I use this server to control 100 Linux clients, /$home/ directory and authentication are served by the centralized server. The other day in one of ...
6
votes
3answers
160 views

Passwords for newly created users?

I am fairly new to Linux and I have question regarding users. When I use the useradd command I don't specify a password. I must use the passwd command afterwards. Does this mean that the user is ...
3
votes
1answer
6k views

Meaning of “Connection closed by xxx [preauth]” in sshd logs

We have a Windows batch script, which connects automatically to a linux server via PLINK (putty). There is NO public private key authentication, the user and the password are in the script. On our ...
3
votes
3answers
206 views

Is there way to stop random software packages from remotely transferring your files?

I am running a bitcoin client on my archlinux computer. If somebody can get ahold of the wallet.dat file, located in the ~/.bitcoin/ directory they can steal my coins. I have minimal software ...
2
votes
2answers
4k views

su - user doesn't work for users without a password

I've created a user on CentOS with useradd -M username. Now, I want to become that user just like su - username. It asks me for a password for that user but I didn't set a password for that user. As ...
2
votes
2answers
232 views

How do I switch from /etc/shadow back to /etc/passwd?

I'm playing with a rather old, heavily customized Linux installation (based on Debian etch, running on a Netgear ReadyNAS device). Recently I've switched from /etc/passwd to /etc/shadow via pwconv. ...
0
votes
1answer
189 views

Why is my ssh connection unauthorized although I have updated my key on the remote machine?

On my local machine I have a public key stored in .ssh/id_rsa.pub To be able to log in to a remote machine I copy this key using ssh-copy-id: ssh-copy-id user@remote-host On the remote host, I ...
8
votes
3answers
3k views

Permit root to login via ssh only with key-based authentication

I have some doubts about certain ssh server configurations on /etc/ssh/sshd_config. I want the next behavior: Public key authentication is the only way to authenticate as root (no password ...
2
votes
3answers
291 views

OpenAM to OpenLDAP to SysAID (LDAP) Authentication

We just began using a new software called SysAid which uses LDAP to authenticate users. We have a client, which uses OpenAM to authenticate their users for a proprietary web application. Our goal, ...
2
votes
0answers
66 views

luks single signon

I've got LUKS (Linux Unified Key Setup) running on a couple of my Linux boxes. I've looked online but haven't seen anyone document how to make it work in a single signon option, but was hoping ...
1
vote
0answers
78 views

How to setup SVN server securely? [closed]

I am a linux newbie but I need to setup a SVN server and have the following 2 requirements: 1) Users to be able to authenticate automatically (with ssh keys, with no password) 2) The repositories to ...
1
vote
0answers
80 views

How do I setup kerberos authetication in Fedora 19

I cannnot seem to find documentation on setting up Kerberos authentication on my Fedora 19 workstation. Which files and programs are involved? My Kerberos server is a corporate AD.
1
vote
2answers
141 views

How to control authentication attempts in PAM?

I would like to configure the no. of times user will be prompted for password(authentication attempts) for login, before dropping the session. Does PAM support this case, if so can you help me out ...
1
vote
2answers
75 views

FTP transfer: I can see files on remote machine, but remote user can't

I had to transfer a few videos and photoes on a FTP server. For that, the person on the remote machine gave me the IP address of that machine where I had to transfer. He told me to transfer by FTP. ...
1
vote
0answers
168 views

HTTPS Authentication problem : Polipo

I use internet behind http proxy, and that requires authentication. I tried using polipo to bypass the authenticated proxy to 127.0.0.1:9134. Applying these settings to my browser, works fine for ...
3
votes
0answers
110 views

WGET - Authenticating root AND all children folders

Before I start the question off, I want to say that a similar question helped me get past the initial login. My issue is as stated below. There's a website that I'm trying to mirror. It is something ...
1
vote
1answer
637 views

How to sign into an open Wireless Network?

I'm running Arch Linux on my netbook. My school have an open Access Point and we must sign into the network via a page which we are redirected to when we try to open whatever website if we are not ...
1
vote
1answer
87 views

Pamtester automate password testing

We have a system image which uses a default password for root. This should be changed, though I have a feeling not all users do this. I know I can test login with pamtester: # pamtester system-auth ...
0
votes
2answers
10k views

SSH authentication using gssapi-keyex or gssapi-with-mic (publickey not permitted)

My company has disabled SSH public key authentication, therefore I have to manually enter each time my password (I am not suppose to change /etc/ssh/sshd_config). However gssapi-keyex and ...
4
votes
1answer
6k views

how do I configure my RHEL5 or RHEL6 system to use ldap for authentication?

I have root access to a RHEL6 system and I want to use the corporate ldap server where I work for user authentication. I ran authconfig-tui and checked [*] Use LDAP and left [*] Use Shadow ...