Ubuntu Servers :: AD Auth - Changing Password At Logon
Nov 17, 2010
I have succesfully set up authentication manually in Ubuntu so users can log on with Windows Active Directory accounts and have their network drives mapped automatically using pam_mount.
Please note due to the setup I can't make any changes to the Windows 2k3 server.
If a user wants their password reset I can change it to a generic password. When they next log on to a Windows computer with the generic password it will automatically ask them to change it to something else.
Is there anyway to get this to work with Ubuntu 10.10? At the moment when logging onto Ubuntu with an account that is in this state the message Please change your password appears, it then proceds to log on without prompting to change the password and natually it won't map the drives etc.
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Nov 19, 2010
i would like to know how to change the "logon "password,not the one under "about me",
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May 30, 2010
On Ubuntu 10.04 with x11Vnc server, if the screen requires logon (such as if locked or upon reboot), through the VNC terminal, I always get authentication error (incorrect password). Sitting at the keyboard, I can logon just fine. Once logged on, I can access everything through VNC just fine.
Error in auth.log (username = bob):
unix_chkpwd[3926]: password check failed for user (bob)
gnome-screensaver-dialog: pam_unix(gnome-screensaver:auth): authentication failure; logname= uid=1000
[code]....
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Sep 1, 2010
I recently installed Fedora 13, Xfce, on my HP netbook. It's using AR9285. When i try to connect to my network with WPA enabled it will not work despite the password info being correct. I'm using a DI-514 router, with no updates to firmware. It only works, if I change the password, then use said password, then, when I disconnect, said password no longer works. WEP works just fine, open network works fine, why wont WPA-PSK work?
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Jan 13, 2016
I am trying to setup 2-factor authentication for SSH with PAM. Its working well, but if the password is incorrect, it does not ask for validation code, but rather asks for the password again. Any way not to warn about an incorrect password?
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Apr 9, 2011
This afternoon, I tried to change the password, for the windows access via Samba, but I goofed.
While logged in with a Putty session, I typed code...
It asked me for the new password after the first line, then again after the second line as expected.
In retrospect I probably should not have typed the first line.
Now, however, I can't log in via putty. When I attempt to, it asks for my password, but neither the new nor old password works.
I DO have access to the Samba shares from other windows machines using the new password so that is OK.
It is a non GUI 10.04 server with one user, mark.
Help, please, how do I fix it?
Ideally, I guess I want the old password for the log in, but the new password for Samba shares.
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Feb 11, 2010
I have ubuntu installed in a partition on my computer and when I installed it i made it so that you don't have to provide a password to logon to the user account. How can I change this?
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Jan 10, 2011
Lately I have been receiving this in my auth.log file. It seems to be repeating over and over, and I didn't know if was anything normal or something I should be worried about...
Code:
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Apr 15, 2010
I am wondering if there is a way for me to logon without being prompted fory user password - I am guaranteed to be the only one using this machine.(I recall seeing a cli code that set this but after lots of searching can't find it)
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Feb 5, 2011
logon will not recognize my password nor will key ring .
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Oct 22, 2010
As far as I understand ssh runs on port 22 but in my /var/log/auth.log I see
Quote:
why is this logged 48504 different than ssh port 22?
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Oct 29, 2010
When ever I restart ssh
Quote:
/etc/init.d/ssh restart
I see following line in auth.log
Quote:
sshd[5678]: error: Bind to port 22 on :: failed: Address already in use.
That is a headless server. What does the above line signify or tell and why am I seeing that? Ubuntu 10.04 64 bit server edition
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Jun 20, 2011
having a hard time mapping a drive from a windows xp PC to a Linux Share. I have edited the SMB.conf file to include the share I want to connect to. when I try try map a drive to the Linux share using NET USE M: \192.168.15.5pairing I get the following error:"system error 1326 has occurred.Logon filaure: unknown user name or bad password."I use a username and password that is valid on the Linux server and has access to the Share.
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Mar 8, 2011
I'm a bit lost with the PHP/Sendmail configuration, maybe somebody could help me getting back on the right track. Following situation:
Postfix:
* accepts smtp on port 25 but from his own domains. Some policy and spamchecks through amavisd are made.
* accepts submission on port 587 and 465 from authenticated users only. Quota and spamchecks prevent outgoing spam.
So I'm enforcing a very strong outgoing spam-policy but the users are still able to use the php mail() function to send spam through the /usr/sbin/sendmail command.
My users have access to their own php.ini so my idea was to somehow enforce the delivery through the local postfix on port 587 or 465 and just let them enter their user/pass in their php.ini. (I suppose, their might be a cleaner-solution ).
Unfortunately, my configurations like smtp_host, port, user etc. are getting ignored if the sendmail_path line is active. But if I comment this line out, php just uses the default, which is the same as configured in the sendmail_path line - so it's active whether i use the line or not (setting it to an invalid command breaks the mail() function completely).
how can I enforce my anti-spam policy on the php mail() command?For my ssh users I just blocked the outgoing connection to localhost on port 25 which seems to work so far, but somehow the postfix-sendmail-wrapper just ignores this.
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Nov 24, 2010
there i have installed 10.10 today and cant logon, i can type the username, but when i try to type the password nothing happens, the cursor blinks but no letters characters or numbers work??? the only key that appears to work is the enter key. so obviuosly i cannot enter a password and it times out after 60 seconds. what do i do is it the keyboard?? this is on an older pc (not this one) that i was using win xp on, and got sick of the hassles with windows.
maybe should i reinstall without passwords?
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Mar 1, 2009
I'm trying to config a customer's samba server to use a MS 2003 SBS for auth. The samba is for file sharing only config'ed with disk quota's. Currently the samba is config'ed for auth = Users. But I want a central point for user auth, and since they already have the sbs in place, I'd like to use that.
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Apr 27, 2010
I am having a hard time with samba. Please point me in the right direction! I cant seem to get the web configuration tool working either.
smbclient -L teraquad
Server requested plaintext password but 'client plaintext auth' is disabled
session setup failed: SUCCESS - 0
smbclient -L teraquad -N
Domain=[OFFICE] OS=[Unix] Server=[Samba 3.4.7-58.fc12]
code....
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May 11, 2010
I have one Ubuntu server 9.04 with samba domain. I have one Xp pro in this domain. When the XP computer logon, the theme is classic... How can I change that? I want the standard XP theme......
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Jan 26, 2010
Our system is based on RH4 and is using pam_tally and faillog to record failed attempts and to lock users out after 5 attempts. We have a requirement to provide a normal (non-root) user logging onto our system, with information regarding the number of failed logon attempts made on their account before the current successful logon (similar to the functionality provided by HP Protect Tools on Windows). My first idea was to add 'faillog -u $USER' to the bashrc, however by the time the bashrc is run - the user has been successfully authenticated and the faillog has been reset back to zero.
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Jan 30, 2011
When I log onto my 10.04 server via ssh, there is the /etc/motd displayed. This motd is made up each time by the files in /etc/update/motd.d/. There is this one file : update-motd-reboot-required The content is exec /usr/lib/update-notifier/update-mot-reboot-required and the content of this one is : if the file /var/run/reboot-required exists, print it.
But who is making this file and why ?we know who it is: it's pam_motd.. but why would I reboot ??!?
editt2 : nvmd [URL]
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Mar 3, 2010
I want to use AD sys accounts to logon to linux servers. What is the best and most secure way to do this. This because we want to ensure it is tracable when a server administrator makes changes to a linux server. Now we use root to make changes to the servers.
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Aug 2, 2010
I have been faithfully following the postfix/sasl/etc install docs from [URL] and seem to have hit a minor snag with SASL authentication for SMTP. KMail cryptically leaves me with a generic auth fail notice and tailing the mail logs gives me
[Code]...
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Mar 1, 2011
I have got a RHEL 5.6 server configured to authenticate via a Windows 2008 domain controller via LDAPS.Everything is working fine, except from the following: When I create a new user in Active directory and check the option "user must change password at next logon", the new user cannot logon and gets an "access denied" message. In /var/log/secure, I find the following:
Mar 1 14:43:21 cpssvn10 sshd[5363]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.3.12 user=testuser2
Mar 1 14:43:21 cpssvn10 sshd[5363]: pam_ldap: error trying to bind as user "CN=CPSS Testuser 2,OU=IBM,DC=cpss,DC=smarterplatform,DC=com" (Invalid credentials)
Mar 1 14:43:23 cpssvn10 sshd[5363]: Failed password for testuser2 from 192.168.3.12 port 4583 ssh2
As soon as I uncheck the "user must change ..." option, the user can log on without problems. Also password change via the passwd command works.
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Jul 6, 2010
Last night I had rebooted my machine and when it came back up it would no longer accept my password. My 7 year old son had been playing on the machine earlier so I assumed he inadvertently reset my password to something else. I rebooted again, added the rw init=/bin/bash was able to get in and reset my password. That worked, I was able to access with no problem. I was able to perform admin tasks, it would prompt for password and accept the password. I just went to edit a config file and all of a sudden it is no longer accepting my password again and (my son has been no where near it)?!!?
I am not even sure where to start troubleshooting this - I know I can reboot and reset the password again - but is there a way to figure out how this is happening.
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Jun 17, 2010
Our Security Admin left the company and did not supply the Debian GUI passwords,o I cannot logon to the server using the GUI. However, I can log in using something like putty.How can I reset the gui passwords.
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Jul 17, 2010
I use the following method for preventing the users from changing their passwords , is there any other method other than this ?
ls -l /usr/bin/passwd
-rwsr-xr-x 1 root root 37140 2010-01-26 12:09 /usr/bin/passwd
so we need to remove the suid for that command as follows :- chmod u-s /usr/bin/passwd now normal users won't be able to change their own passwords - and only the root user will be able to do it for them.
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Nov 24, 2010
The other day I wanted to make a small change to my (user account) password, but I kept getting errors about the new password merely being the old with changed case, or just a cyclic shift etc.Security issues aside, is there any way I can override these checks so that I can make whatever minor changes I like to my password?
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Feb 25, 2011
I am running ubuntu 10.10 desktop, i have my /home on a seperate partition and its encrypted. Today i was changing my password on the all the machines in my house ( netbook, desktop x2 and server all ubuntu) and i didnt want to go in the bedroom to change the password on my one desktop, (pure laziness) so i did it through ssh using
Code:
sudo passwd lynx
now when i restarted it later on i realized i cannot log on to the GUI. I get an error "Could not update ICEauthority file /home/lynx/.ICEauthority" and "There is a problem with the configuration server. (/usr/lib/libgconf2-4/gconf-sanity-check-2 exited with status 256)" also "Nautilus could not create the following required folders:/home/lynx/Desktop,/home/Lynx/.nautilus. Before running nautilus ,create the folders or set the permissions so that nautilus can create them".
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May 17, 2010
Is it possible to change the log in password? Someone set this up for me and the password is too simple.
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Mar 23, 2010
I did these steps to change my username: I like to directly edit /etc/passwd and /etc/groups
First open a terminal, become root
Code:
sudo -i
Now:
Code:
usermod -d /home/new -m old
sed -i -e 's_old_new_g' /etc/passwd
sed -i -e 's_old_new_g' /etc/group<-
sed -i -e 's_old_new_g' /etc/shadow
My computer shut down after I did the second step and now my password isn't working! I cannot open my home folder or get back to root!
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