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

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How to authenticate users via PAM using freeradius?

I have like 20 users in server2, and I need to configure PAM on server1 to authenticate users against /etc/passwd file using freeradius which is configured on server2 with a shared secret ...
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0answers
18 views

Conditional authentication

I want to use the following authentication in Linux: If during the boot flash drive is connected, the logon to the operating system is performed by the user "user1", in this case should be carried out ...
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0answers
10 views

Disable authentication password

I forgot my authentication password for downloads. So now want to remove it all together I haven't trying any command yet
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1answer
14 views

Authentication failure

I'm using ubuntu 3.13.0-24-generic. I know root password and login before (my friend can use su command), root password not change but when i using su command it appear " authentication failure", What ...
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0answers
14 views

Dovecot user login failed

I have a problem with my dovecot. I want to make a mail server using postfix, dovecot, thunderbrid and outlook for windows users. But when I install and configure dovecot, I can't login with my mail ...
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0answers
35 views

Could not load host key: /etc/ssh/ssh_host_ed25519_key in /var/log/auth.log

I have an Ubuntu 14.04 instance running on AWS. I was browsing the auth logs (/var/log/auth.log*), and noticed the following line appearing: Could not load host key: /etc/ssh/ssh_host_ed25519_key ...
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1answer
29 views

Can a user with ssh keys set their own password after logging in with keys without knowing their password?

I'm playing around with a script to create a user across a number of machines. I'd like to not know the users password at any time, but having the public SSH keys is quite acceptable to me. The user ...
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0answers
12 views

Can I disable other users authenticating while on my account?

So I have not realized this feature until recently after adding another admin to my computer and I realized when updating that either of the admins can authorize the update while logged into my ...
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0answers
33 views

Free Radius User Authentication

I have a question regarding Freeradius.As of right now I this is a sample of how my users are set up /etc/freeradius/users Test Cleartext-Password := "test123" Service-Type = ...
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0answers
39 views

Can someone help me escape Skype and use Ekiga?

I really want to escape from Skype because its Linux support is abysmal and its ethics questionable. The most prominent alternative seems to be Ekiga, but I just can't get it working. Could someone ...
1
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1answer
35 views

Can't log in from terminal

I have a server with a hosting provider (OVH). I've never had any trouble logging in via SSH, but I use RSA authentication, so I'm not sure if I could actually get in with a password. However, when ...
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1answer
53 views

how to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator?

How to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator (It can also be setup for non Google accounts)?
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0answers
65 views

Blocking Specific User to specific website using Squid Web Proxy Webmin

I'm using Squid Web Proxy via Webmin and currently it works. I have set the proxy authentication too. source : ...
1
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1answer
61 views

Dovecot IMAP (port 143) not working with SASL while Postfix (port 25) is

I've got SASLAuthd working (via LDAP), and am also successfully able to telnet via port 25 with my LDAP credentials. Postfix is configured with Dovecot. All 3 services are running fine (Postfix, ...
1
vote
1answer
114 views

Ubuntu Phone (Aquaris 4.5) How to connect to a wifi network wich requires an account?

So I tried to login to the WiFi network at my University, which requires an account and password, but I never came that far. Whenever I select one of the networks (there are 2 usable networks) it ...
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0answers
8 views

**PLEASE** Help with Password Recovery / “Authentication token manipulation error” / keyboard won't type [duplicate]

I am really hoping that someone can help me with Password Recovery. A couple weeks ago my doctor found a 6 cm tumor in my head and had a surgeon remove it asap. Good news, it's benign so I get to ...
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0answers
28 views

Ubuntu LDAP authentication

Need to know if i'm on right path. Trying to use LDAP authentication for Web user access of network resource. I have configured LDAP server and client_auth (ldap-auth-client) demon on Ubuntu ...
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2answers
397 views

Yubikey Two-factor Authentication Full-disk Encryption via LUKS

I recently acquired a Yubikey Neo - a nifty little hardware second factor authentication device. It's primarily intended for use with One Time Passwords, and the emerging U2F protocol - but since ...
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0answers
31 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
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1answer
74 views

Using wget to download websites when logged in to a password protected session

I am having difficulty downloading websites with wget that require specific authentication. Specifically, my university has me login to my account to be able to access university related websites. I ...
1
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0answers
135 views

Authentication not working properly after using fingerprint authentication in Ububtu 14.04

I installed fingerprint-gui to use fingerprint scanner in my thinkpad. The commands used were sudo apt-add-repository ppa:fingerprint/fingerprint-gui && sudo apt-get update sudo ...
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0answers
20 views

more information about the authntication [duplicate]

I have turned by mistake the account to standard position the passowrd right but the authenticate say your authentication attempt was unsuccessful so Icant download any program
1
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3answers
85 views

Multiple Users Private / Public Keys

I am currently undergoing a project of maintaining a server with certain simple services (mail, web) for a group of thirty users. I would like to use pub/private keys but I guess unsure of their use. ...
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0answers
21 views

PKCS11 Error when setting up

I have been trying to setup contactless authentication on my Dell E6520. I have 6 new/blank cards. I am able to get Windows to log me in with one of them but Ubuntu seems to be having trouble. I keep ...
0
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1answer
67 views

can't authenticate for wifi n access

Beginning about two weeks ago, perhaps owing to a software update, Network Manager has been unable to authenticate successfully on N type WiFi networks, but continues to work with other network types. ...
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0answers
48 views

Enable Google Authenticator with PEM key-based auth of AWS EC2 Ubuntu Server

I am trying to configure to use Google Authenticator with AWS EC2 PEM file key-based auth. I have tried a number of setups with the closest being a combination of this: ...
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2answers
69 views

All sites fail with 401 unauthorized

I have Ubuntu 14.04 LTS and until yesterday everything was fine. Today I cannot access any site (no matter which browser I use). If I start Firefox, it wants to go to: start.ubuntu.com and I get a ...
1
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0answers
154 views

Samba keeps warning 'Session closed for user nobody'. Why?

I've set up an Ubuntu 14.04 server, using Samba to share files to our Windows clients. Everything appears to be working correctly, but while checking my auth logs, I see the line 'session closed for ...
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0answers
26 views

how to have a samba share that REQUIRES login for both a user and a guest

So my question is, with a samba share folder I'd like it so that anyone trying to access it would require authentication, and a valid user can login. But I also would like guests to also be able to ...
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0answers
68 views

Authenticate Ubuntu against OS X 10.9 Server: No passwd entry for user 'user'

I'm a computer tech at a school and having some issues. We're an all-Mac district running OS X Server 10.9. I have some Core Duo iMacs that are too old to run OS X, but they're perfectly good ...
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0answers
93 views

minimal data showing in auth.log

I have locked my server down and to help troubleshoot any holes, I look in the logs, especially auth.log. In the logs, it shows that there are attempts to log in but no data shows. I am not able to ...
0
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1answer
275 views

Unable to use RSA keys with SSH: Server refused our key

I am trying to use RSA public/private keys generated by PuTTY to log in to two GNU/Linux computers from Windows computers, and it works for one but not for the Ubuntu computer. The keys were generated ...
0
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0answers
359 views

Trying to install Squid3 on Trusty with AD Authentication

I'm trying to install Squid3 as a proxy server on 14.04, with AD Authentication such that authenticated users will not have to 'login' to the proxy each time they want to access the internet. I've ...
0
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1answer
69 views

Use Google Open ID to automatically create accounts/login to Ubuntu

What I'd love to be able to do is to have the ability to use Google's Open ID system to have users automatically authenticate with Ubuntu. Yes, it would be Chromium OS-like in its login but there are ...
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1answer
132 views

Using `System.DirectoryServices` on Ubuntu to authenticate with windows active directory

I have developed c# application using monodevelop, which basically does ldap authentication with windows active directory. And works fine in windows environment. but if i use the same code in the ...
0
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0answers
55 views

Access denied when using domain credentials

I am unable to login to Ubuntu with my domain credentials....I am getting access denied. My machine has authenticated against my domain for 2+ yrs. Then a few weeks ago, when resuming from sleep, my ...
0
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1answer
128 views

Wifi connection deauthenticated by router

I use ubuntu 14.04 and I have an Acer V3-571G laptop. I have an O2 Box 6431 modem which I have received from O2. My wifi connection works fine except when I restart ubuntu or laptop. Next time it does ...
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0answers
214 views

What is the correct way to modify /etc/pam.d/common-auth?

By default /etc/pam.d/common-auth looks like this $ cat /etc/pam.d/common-auth # # /etc/pam.d/common-auth - authentication settings common to all services # # This file is included from other ...
0
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1answer
57 views

Why isn't my apache authentication working?

I am trying to set up apache2 authentication for a given website which can be found locally on my webserver. When I try to open up the website it states Internal Server Error 500. Then I put the ...
0
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0answers
103 views

How to resolve failed PAM radius authentications for local account?

I have a local account which is not set up for radius on my 14.04 server, then I have multiple radius accounts. The local account is used for automatic file transfers from network devices and creates ...
0
votes
1answer
111 views

How can I use my Active Directory credentials to log in to my Linux machine?

I would like to use the same username/password to log in to my Linux machine as I do for a Windows machine that authenticates against Active Directory. In particular, what I want is: When I log in ...
2
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0answers
149 views

How do we implement requirements of password policy?

This question might look similar but I could not find a solution to this which covers all the below requirements of the policy, Hence please help me: - Incorrect pass lockout (after 3 incorrect ...
0
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1answer
1k 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 ...
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0answers
43 views

how do I create a user data base for postfix/dovecot sasl [closed]

I am trying to install postfix in Dovecot sasl with virtual mailboxes and virtual users. How do I create the user/password database file. I do not want to use Linux system passwords showdow or ...
0
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0answers
58 views

RE Q & A from Aug.16 '12 at 10:32

@Eliah When I first set up 14.1 I was able to download apps and change settings but now I can't.I also can't get updates. When I'm asked to authenticate and type in my password it says Your ...
2
votes
1answer
156 views

Check which SSH key was used to login

So stupidly enough in our development team every individual SSH Key is used to access the root user directly. When Checking the auth.log I can find this Dec 18 09:45:04 webserver sshd[12377]: ...
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0answers
16 views

No longer asked to authenticate

I used to receive an authentication screen upon startup. Lately, the authentication screen has been popping up later and later in my session, and as of this week, I am no longer being asked to ...
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2answers
29 views

Accessing the computer [duplicate]

I have my son's laptop. He passed away this year and I am trying to access his computer. I dob't have the password or the email address he used. It is asking me for an authentication code when i ...
0
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3answers
113 views

how to run as administrator ubuntu 14.04 and not as guest?

today I installed ubuntu 14.04 and also a new user to the new operating sysytem. there are several problems I am facing with it they are: 1.I cant log in as administrator but as guest,can you help me ...
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0answers
48 views

Can login via ssh, but not system tty

Here's something weird. I can: ssh xyz@localhost provide my password, and login as xyz. However, I if hit ctrl-alt-F3 to go to the system prompt, and try to login as the same user xyz I get a ...