Security :: Login Automatically For An User Without Authentication?
Mar 9, 2010I have installed CentOS 5.2. I want to login automatically for an user without authentication.
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Ubuntu Security :: Configure SSH Key-based Authentication And SSH Password Authentication In Same Machine For Different User?
Jan 10, 2010I want to configure SSH key-based authentication and SSH password Authentication in same machine for different user .
View 1 Replies View RelatedSecurity :: User Authentication Security Mechanisms
Feb 2, 2011What security mechanisms are used by recent versions of the Linux operating system during user authentication?
View 3 Replies View RelatedSecurity :: SSH User Authentication Using Certificate
Mar 19, 2010I was trying to configure user authentication in SSH using certificate method.As u all know the usual way of authentication is using the ssh-keygen method. But i want the another method where we create a certificate key and send it to the CA, which signs it and send back etc etc.I cannot find any unique procedure in the net to configure this method.
View 3 Replies View RelatedSecurity :: Dovecot User Authentication Failed
Jun 23, 2010Im using CenOs 5 and have install a mail system(postfix+dovecot),when I trying to enable selinux for enforcing mode and i'm have some issue, the user authentication failed. How can i to fix this problem?
View 2 Replies View RelatedUbuntu Security :: HOTP Authentication At Login?
Jun 25, 2011Does anyone know if/how its possible to integrate HOTP authentication into GDM login manager? Basically what I want to do is have it ask for the password of the account, then another prompt come up asking for the code for the account.
I know how to set it up, but I'm know if modifying the PAM module for requiring OATH/HOTP authentication will make this happen or if it will just break the system...and this is one thing I don't want to have to fix.
Fedora Security :: Root Login Via Ssh 12 Password Authentication?
Jan 27, 2010Can't seem to do it, wondering if anyone knows how? Normally there's something in sshd_config that can be switched to true or yes to allow root login but I can't see it in fedora 12.I can login via root at a terminal no problem, just not via ssh, I get access denied every time. Also, I need to login using password authentication.I've done: 227169 but that's just for GUI which I don't really need since I rarely ever log into the GUI.I have also searched through here and mostly only found info such as above, how to enable root login for GUI, or billions of posts about how logingin as root is bad but I cannotswer to my question.DISCLAIMER: Please do not reply to this thread if all you can contribute is the question of why I need root or to put some message telling me I can do everything using su, etc, etc. Please only contribute if you can answer my question. A: My machine and a valid quesiton. B: Spirit of Linux is open, not restrictive
View 3 Replies View RelatedFedora Security :: Dovecot User Authentication Failed With Selinux
Jun 24, 2010I'm using FC8 and have installed a mailserver(postfix+dovecot),when I trying to enable the selinux mode to enforcing and i'm have some issue, the user authentication failed.if turn the selinux mode to permissive, then it work right.How can i to fix this problem?
View 14 Replies View RelatedUbuntu :: Automatically Login Can't Select User / Fix It?
Jun 19, 2011I having really bad problem can't select user for Automatically Login
here is a picture as proof what is my problem !
As we see i can't select user in login as
image is in attachment !
if somebody knows how to bypass it trout terminal i will be glad to fix this problem my self any way thanks for attention !
Ubuntu Security :: Bad Login Protocols - Graphical Login For Gnome Sizes Itself To Accommodate A User's Exact Password Length
Dec 14, 2010I'm seeing really bad user login format under a standard installation and am wondering why ubuntu does this as default. I have noticed that the graphical login for gnome sizes itself to accommodate a user's exact password length. This indicates to me that somewhere on the unencrypted part of a standard installation with user encryption contains at least some indication of the content of the password length which seems a security flaw even if not a complete hole, it majorly reduces the number of attempts a cracker would have to cycle through.
And that's assuming that *only* the length is contained. Furthermore it seems that it would be MUCH better to simply display the number of characters entered into the pw field and allowing the gui to expand itself from an fixed size as the field is filled out so the the user still receives visual feedback for entering characters. Either a simple character count display should be entered into the field or a 10 dot to new line so that one can visually quickly count the number enter by multiplying from a 10base graphical observation.
General :: Shell Script To Automatically Login Through Ssh And Create User?
Oct 20, 2010I was trying to create a shell script which will automatically login to the server 192.168.1.7 and checks if a user exists there or not, if it doesn't exist then it should create the user.I have very little idea about shell scriptThis is what I tried:Quote:
#!/bin/bash
pass="sacharje"
ssh 192.168.1.7
Now, how to pass that password automatically to the ssh when it asks for the password? (I can't use public key authentication here)
Ubuntu Security :: Mount A Truecrypt Partition Automatically With Login Password?
May 17, 2010I found a way some times ago to mount a truecrypt volume when opening the session by insertion of the login password in the mounting script instead of putting it in clear in the script. I don't remember to command to read/transfer the password.
View 2 Replies View RelatedUbuntu Security :: Set Automatically Log In To A Specific User Account And At The Same Time Lock The Screen?
Jul 6, 2011Is there a way to set Linux to automatically log in to a specific user account and at the same time lock the screen? I want to save time and trigger various software that always should start up on boot, while leaving the computer unattended during startup (extra important and practical for remote control boots), by enforcing a 'screen lock' so that no-one can see what happens behind the login screen without entering the login credentials.
View 3 Replies View RelatedGeneral :: Create A Profile Settings And Network Drive Can Be Mapped Automatically When User Login?
Mar 26, 2010create a profile settings and network drive can be mapped automatically when user login to the (like Domain and active user profile on windows environment) Ubuntu systems?
View 1 Replies View RelatedGeneral :: Login Window Dies When User Authentication Dies
Mar 8, 2011Am trying to set up a new system but am getting some strange behavoir. I've administered an Irix system before. I have opensuse 11.3 installed with gnome running. When i enter a bad user id in the windows login screen, the bad authentication causes the x window manager to crash and leaves the system in the ascii terminal mode login. I then have to login as root and do an init 3 , then init 5 to get the x server started again an get the windows login started. Has any one seen this behavior before and how can i fix this. Been hunting through /etc/X11/xdm to see what startup scripts could be causing this.
View 2 Replies View RelatedFedora Security :: Need To Login As Root User
Sep 8, 2009I have a problem, I have installed Fedora 11. And i need to login as root user.
How to do so?
Ubuntu Security :: Log User Login Attempts Only?
Jun 29, 2010How can I set up snort to only log and detect/capture logins using root or any of the "homeusers" login accounts or names?
View 9 Replies View RelatedSecurity :: Disable Remote Login For Particular User?
Feb 25, 2011I want to disable the remote login for particular user id in linux server.
View 11 Replies View RelatedSecurity :: LADP User Unable To Login Via SSH?
Sep 15, 2010My case is that, the LADP user connected could not login via SSH. This user could login in the system console. And all the other users could login within ssh. And I was wondering whether any one could suggest which place to check next. And here is the detail: I was using SUSE 11.3 when I met this error. PAM module is used, and the corresponding files in /etc/pam.d/ have all been updated. Here is what I've added:
Code:
yl-1:/etc/pam.d # fgrep ldap *pc
common-account-pc:account [default=bad success=ok user_unknown=ignore] pam_ldap.so
[code]....
Security :: Make A Choice On What Authentication Protocol To Use For Authentication And Authorization?
Jan 17, 2011I need to make a choice on what authentication protocol I want to use for Authentication and Authorization. I was looking at Radius and then literature suggested that Diameter was a better protocol. Keep in mind I need this on a hetrogeneous setup ( linux & windows together). Diameter seemed like a good fit until I discovered that the open source code no longer seems to be maintained ( C/C++).
I was also looking at Kerberos as an option though there is alot overhead with the server. SSL/TLS or EAP? I am looking for simple but secure and am new at the security protocols.
Fedora Security :: Administrative Login In User Account?
Sep 25, 2009I am a new Linux user and have a question about the administrative authentication. When I am logged in as a user and I need to do something that requires root privileges the little password window comes up and I enter the root password. My question is how long are the root privileges granted for?I noticed that a few minutes after finishing checking out the firewall configuration tool and closing the window that I was still able to re-enter the fire wall tool and other administrative tools. How do I log out of the root privileges without logging out and then back into my account?
View 2 Replies View RelatedUbuntu Security :: How To Lock Terminal On Login For User
Apr 22, 2010I recently set up a family computer for a friend, and now his son is "experimenting" with the terminal (randomly entering commands). since he could accidentally do something bad, I am supposed to prevent him from using terminals, but only as hi user. I tried vlock and away, but with vlock it says 'this terminal is not a virtual console', and away can't seem to lock all consoles.
View 9 Replies View RelatedUbuntu Security :: Capture User Password On Login?
Apr 4, 2011Second off, I'm trying to capture a user password on login (through gdm) such that I can re-use it for a service like Kerberos or AFS. The idea is that the user has to log in only once, and then I renew the tickets and tokens until they log out again. If there's a better way to do this
View 4 Replies View RelatedSecurity :: Lock User Accounts After Too Many Login Failures?
Jun 8, 2010I am trying to disable accounts after 5 unsuccessful login attempts. I am following the guidelines in this article:
[URL]
This is on an Oracle Enterprise 5.4 box, which is essentially RHEL 5.4 Here is what my /etc/pam.d/system-auth looks like:
--------
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
[code]....
Unfortunately, the account does not seem to be locked or disabled. As root, runninng 'su test2 -c <some-command>' always sucessfully runs <some-command>, and leaves the failed attempt count at 6. /etc/shadow does not have an * or ! anywhere in the encrypted password for the 'test1' user.
What am I doing wrong? I thought that with the max attempts set to 0 in faillog, that the deny= parameter would be used. I thought I should be using su <user> -c <command> from the root account to test if the disable feature is working.
Ubuntu Security :: Can Login With Public Key But Forgot User Password?
Aug 26, 2010I have a problem with my ubuntu account. I am running 4 virtual machines, based on jeos-8.04 and I am using a public key authentication to login to my account (via ssh). This is not the problem, I have the key and the passphrase. But when I am logged in, I can't sudo, because I forgot the password for the accout.
View 6 Replies View RelatedUbuntu Security :: Limit Login Attempts For Specific User?
Jan 15, 2011I'd like to limit login attempts for specific user. I've found information in manpages: [URL]but I'm not sure if this '@' is purposly there, so would be that correct?
Code:
aparaho - maxlogins 4
or
Code:
@aparaho - maxlogins 4
Maybe '@' is a group syntax? I'm confused.
What happens after 4 failed loggins? Is it enough to restart system to get another login attempts?
Are there any other values that it is reasonable to limit for safety reasons?
Security :: Doesn't Access Root Passward From User Login
Nov 26, 2009I get the problem to acess root password when i am in user login, means wahen i am in user login and want to install software from terminal then he asked root password, when i supplied root password but he give me login incorrect.
View 2 Replies View RelatedSecurity :: Non Privileged User Sessions Close Immediately After Login?
Apr 16, 2009while hardening a red hat enterprise 5 installation I have done something that causes the sessions of all user accounts except root to close immediately after authentication. in the /var/log/secure log file it will show three log entries per attempt:
<date/time><hostname> login: pam_unix(login:session): session opened for user fred by LOGIN(uid=0)
<date/time><hostname> login: LOGIN ON tty1 BY fred
<date/time><hostname> login: pam_unix(login:session): session closed for user fred
Since I did a number of things and have not been able to identify what caused this.
Security :: PAM Module - Allow A User To Connect To A Server Via SSH With Any Login Name Or Password
May 5, 2010My goal is this: Allow a user to connect to a server via SSH with any login name or password without checking to see if that account exists on that server. Their account would be captured by a universal account say, 'generic_user', and then they would be directed to one of my python scripts with the username and password they supplied for initial login. At this point my script would capture their SSHD process ID and allow/deny their existence based upon a MySQL/Subscription check.
The part I'm having trouble with is with PAM and allowing the user to login with any credentials and be successfully authenticated under the generic account. Beyond that, everything is great.
Security :: Requiring PPK Secure Key - Disabling User/passwd Login
Apr 23, 2010I am using Red Hat and was wondering how to disable username and password only login and require that a PPK secure key file be used for authentication ? I can log in using the secure private key and the public key that is in ~/.ssh/authorized_keys but i can still log in using the plain username and password login.
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