Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.

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2
votes
0answers
8 views

Apt proxy settings are not transmitting username/password

On a 12.04 server machine, I've got Apt configured to use a proxy to grab its packages. To wit, in /etc/apt.conf.d/80proxy, I have the two following lines: Acquire::http::Proxy ...
0
votes
2answers
10 views

When using ifconfig to see my Mac address, which one is for connecting to a wireless network?

I am using an older laptop that I converted from windows xp to ubuntu 14.04, so my question is about what Hardware address should I use to connect to my college network? The reason I ask is because ...
0
votes
0answers
21 views

First Time Ubuntu user, problem authenticating app download

I am new to ubuntu... as in just installed it a little bit ago. I no nothing about ubuntu but thought it would be a fun thing to explore a new operating system. I got it installed ok and was ...
0
votes
0answers
8 views

How to overwrite PAM rule from `common-auth` ? (`nullok` to make sshd accept empty passwords)

I got advice to change pam configuration (as I look for a way to make ssh user with empty password): sudo sed -i 's/nullok_secure/nullok/' /etc/pam.d/common-auth However in /etc/pam.d/common-auth I ...
0
votes
0answers
23 views

Ubuntu 16.04 doesn't support PEAP authentication without CA certificate

In our college, we have PEAP authentication system for LAN Authentication. With the new Ubuntu update to 16.04, the PEAP Authentication asks for the password again and again and doesn't connect. It ...
0
votes
4answers
4k views

SSSD password change not working with LDAP backend

Environment info: AD on win 2k8r2 Ubuntu 12.04.5 LTS SSSD v1.8.6 everything is in the same vlan I have an LDAP / SSSD solution in use on our Ubuntu servers. The auth process works correctly ...
0
votes
1answer
4k views

How to configure system wide proxy with user authentication

I would like to use my LAN's proxy server in Ubuntu Desktop 12.04, but all my attempts have failed. Here is what I did: 1) I went to System Settings Menu > Network, selected Network Proxy, Manual ...
1
vote
0answers
21 views

Configuring NFS mount to use LDAP user id

My research group uses LDAP authentication for all the desktops. However, we've purchased a few laptops and would like to set them up so that they don't require LDAP authentication (so we can work ...
1
vote
1answer
63 views

Ubuntu 15.10. Rhythmbox + last.fm = Token expired

I am using Ubuntu 15.10 and Rhythmbox. The problem is that I can't login to last.fm. The program always gives an error saying "Token expired". I upgraded Rhythmbox (to 3.3) and its plugins from the ...
0
votes
1answer
67 views

Exchange MAPI Authentication Loop

Ubuntu 15.10 Evolution 3.16.15 Trying to access my work's Exchange MOBI server (curse you, proprietary Activesync), but authentication just hangs and continually asks for my password. User and ...
5
votes
0answers
132 views

Why is “Authentication is required to …?”

When I plug an SD card into the SD card reader (/dev/mmcblk0), a popup appears, saying: Authentication is required to mount a device. When I plug in a VGA cable between my laptop and an external ...
0
votes
3answers
832 views

Ubuntu 16.04 upgrade killed owncloud … and many other things but right now I need help with authorization

Ubuntu 16.04 is a nightmare. I have had to fix mysql php zoneminder ... my website doesn't work anymore and owncloud is giving me an error. When I try to open owncloud I get the following: ...
1
vote
0answers
91 views

Problem when setting 802.1x authentication in Ubuntu 16.04

I live in a campus and we need to set certificates and private key in 802.1x tab to connect. The problem is that when I try to add the private key, it says: "Unencrypted private keys are insecure" and ...
2
votes
1answer
6k views

authentication required by wifi network ubuntu 14.04

Whenever I connect to my wifi network, this annoying 'authentication required by wifi nework' window pops up, with my wifi password in it. All I have to do is to press the Connect button. Still I ...
-2
votes
1answer
27 views

Not able to ssh as root on 14.04.2

I have done all the workarounds, yet, I am still not able to ssh as root. I have already modified PermitRootLogin to yes, and I have reset ssh services. I have even rebooted the VM, but it is just not ...
2
votes
1answer
29 views

Find out which program requested authentication

I get password prompts like the one below every now and then. Usually they say: Authentication is required to change your own user data But I have not requested to do so. This often happens ...
5
votes
1answer
6k views

I can SSH into a remote host but get “Connection reset by peer” with SSHFS, what do I miss?

I created a key pair to connect to a Synology disk from 12.04. Deployed, edit ~/.ssh/config to automatically use it. Tested: ssh user@remotesynology -> works like a charm. Tested on a second remote ...
1
vote
1answer
263 views

After moving home directory, ssh configuration is not working

I moved my home directory from /home/user to /media/newDrive/home/user. Everything seems to be working at first, except my ssh configuration. I was able to log into this machine from my laptop with ...
0
votes
1answer
40 views

Unable to connect to internet behind proxy using terminal in ubuntu 14.04

I am having trouble while running sudo apt-get update. It is asking for proxy authentication, even ping google.com not working. Though I have updated apt.conf file at /etc/apt/ location but still not ...
15
votes
7answers
19k views

ssh no longer allows public key authentication

My machine recently stopped accepting incoming public key authentication. I have an ubuntu 11.04 desktop that I ssh into from a windows machine. I use putty with pageant. I am able to connect but ...
-1
votes
0answers
30 views

Authentication: what should I enter when the system asks for authentication

TO: Ask Ubuntu Subject: Authentication I a sorry because it is the second time I ask this question but the first time I did not get a working answer. On 28 Mar 2016 I upgraded to ubuntu 14.04 ...
3
votes
3answers
35k views

Public Key authentication failed

I am using ubuntu 13.10, and the server runs ubuntu 12.04. I had generate private and public keys using ssh-keygen, and put id_rsa.pub to server side and added it to authorzied_keys accordding to the ...
1
vote
0answers
17 views

Not able to run jhbuild:Error executing command as another user: Not authorized

I am running jhbuild sysdeps --install After running this command it is asking for authentication: ==== AUTHENTICATING FOR org.freedesktop.policykit.exec === Authentication is needed to run ...
0
votes
1answer
7k views

Home directory permissions preventing ssh key authentication on Ubuntu Server 14.10

I have ubuntu server 14.10 with an SSH server on it, and have password authentication working fine from my System76 darter laptop running Debian Sid. I want to switch to rsa-key authentication. On ...
14
votes
5answers
11k views

I deleted the “/etc/passwd” file and cannot log in

I was trying to change my username and also my home directory (/home/username) and my system started to crash. I deleted the passwd file but I had a backup named passwd_bkp. I tried to rename this ...
0
votes
0answers
8 views

How to auto open web browser on network connect

Sometimes when I come across certain networks i.e. (school, work etc.) that need me to open my web browser to authenticate. Does anyone know how I can make it so when I connect to a specific SSID ...
1
vote
1answer
51 views

ssh:permission denied,please try again

I am having two laptops both having ubuntu 14.04 LTS and they have wireless connection. When I try to access other system,it says permission denied,try again.What to do? The following after I type ...
3
votes
1answer
699 views

How to have cntlm configuration per user?

This tutorial http://zipizap.wordpress.com/tag/cntlm/ suggests configuring cntlm using the file etc/cntlm.conf. It works great, but it means that all users logged to the machine will be using the same ...
1
vote
1answer
767 views

Internal Server Error (HTTP 500) when issuing an authentication token for OpenStack's demo user

Trying to install OpenStack on a VM (host Win10, guest UbuntuServer14.04.3) I'm following the installation guide (http://docs.openstack.org/liberty/install-guide-ubuntu). When trying to issue the ...
0
votes
0answers
18 views

Can't login in cups web console

I don't know why, but I simply can't do any administration tasks simply because I can't login in cups web interface. This is my cupsd.conf: LogLevel warn MaxLogSize 0 Listen localhost:631 Listen ...
7
votes
1answer
53k views

Can't SSH in as root

I'm using the default installation of openssh-server for my Ubuntu 14.04 server. I can connect through the console as root like normal, with my username and password. When I try to SSH with the same ...
0
votes
0answers
10 views

authentification for external and internal device

I'm wondering why should I input each time my password for "conect" to my second hardrive, and worse, each time when I try to use an usb-stick and when I eject it... I have the same configuration in ...
4
votes
4answers
9k views

Wireless Network Found, can't connect, repeated requests for authentication

After trawling through the internet, on forums, support websites, and through dozens upon dozens of answered questions on this site, I've not found a solution to what seems like a fairly regular ...
4
votes
6answers
9k views

Gnome/X logs off immediately after login — which logfiles are relevant?

I've been tinkering with fingerprint-gui as well as X/xrandr resolution settings. When I start my machine, it boots up normally. As soon as X and gnome have finished starting, it logs me off ...
1
vote
0answers
25 views

15.10 Biometric Auth

I have seen biometric authentication such as Pam-face-authentication and the such, but when I tried to get it to work, it didn't do anything, I realised it was old, does anyone know of a good ...
0
votes
3answers
26 views

Authentication of updates and downloads

I'm a silver surfer beginner giving Ubuntu a go on my backup PC because my Windows 10 drive has packed in. Everything is fine until I try to update from v 14 to v 15 or other installed software. These ...
2
votes
1answer
22k views

How do I manage users in ProFTPD?

How do i add a new user to my FTP server running ProFTPD. I have the server running, i added a system user but i get Login incorrect. Thank you for your help in advance.
101
votes
7answers
69k views

Why am I getting authentication errors for packages from an Ubuntu repository?

I'm experimenting with VPNs, so I wanted to install pptpd. john@desktop:~$ sudo apt-get install pptpd [sudo] password for john: <snip> The following extra packages will be installed: bcrelay ...
1
vote
1answer
150 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
0answers
22 views

Authentication error setting up mail server

I'm setting mail server using dovecot pop3 in ubuntu 14.04. But username doesn't match with password and show the following error: telnet localhost 110 Trying 127.0.0.1... Connected to localhost. ...
0
votes
0answers
23 views

Ubuntu stuck in login loop [duplicate]

I've tried all the previous answers that are likely a duplicate of this to no avail. The contents of my .Xauthority file is as follows: ubuntuOMIT-MAGIC-COOKIE-1 … followed by a bunch of special ...
0
votes
0answers
72 views

How to solve server certificate Verification failed!

Recently I installed a complete ubuntu package on virtualbox and use it via vagrant ssh in windows.from yesterday i have a annoying problem,I cant use sudo commands for install,update or everything ...
0
votes
0answers
89 views

About Mail `Authentication Request`?

I've installed Evolution, after that I've opened it, from that on-wards still I'm getting the mail Authentication Request as given below, I've uninstalled Evolution though,still at each time of ...
0
votes
0answers
10 views

Lightdm - Login using two passwords?

I was thinking of an extra security layer by using two passwords for login. Is it possible to configure lightdm in such a way that it will ask you for two correct passphrases? I thought of including ...
0
votes
0answers
76 views

Why is “authentication” not working with my user login password?

I'm trying to install Steam. I've downloaded it then right click the folder and hit "Open with Software Center". When I attempt to install, it asks for a password to authenticate. So I typed in my ...
1
vote
1answer
51 views

How to disable show password?

I work for a school and I want to disable this part. When ever the network goes down and it has to reauthenticate, the kids have a chance to see the password. How can I disable that part?
16
votes
1answer
10k views

Error authenticating some packages while upgrade

When I try to upgrade my ubuntu 13.04 to 13.10, it gives the following error: It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again ...
4
votes
2answers
5k views

Software can't be installed or removed because the authentication service is not available

I'm trying to install flash via the software center and I get this error : "Software can't be installed or removed because the authentication service is not available. ...
0
votes
0answers
17 views

Can somebody confirm that Samba authentication works on ubuntu 15.10

I am just re-approaching this problem again because I have shelved it for a while. I posted an issue I was and am experiencing with Samba authentication not working when connecting from a windows ...
19
votes
14answers
100k views

Trying to do ssh authentication with key files: server refused our key

I'm trying to setup ssh authentication with key files in stead of username/password. The client is a Windows box running PuTTY and the server is a Ubuntu 12.04 LTS server. I downloaded puttygen.exe ...