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.

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2
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1answer
677 views

A messagebox keeping popping up in my centos VNC server asking to change proxy settings?

I have included a screenshot of what it looks like. It keeps appearing and in the morning you to close it 50 times. Could you please help me identify where the problem lies? NOTE: It's CentOs 6 ...
2
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0answers
862 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
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0answers
427 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 ...
2
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0answers
196 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 ...
2
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0answers
2k 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 ...
2
votes
3answers
394 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
83 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 ...
2
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0answers
214 views

SSL Configurations for Intermediate certificate

I had implement a mutual certificate authentication and it worked successfully for following steps : create root ca (self-signed) create server certificate and sign it with ca private key create ...
2
votes
1answer
276 views

Configure SSL Mutual (Two-way) Authentication

I was asked to do it "Configure SSL Mutual (Two-way) Authentication" and I don't know where to start or how to test it . server and many clients . they can access code on server only if they have a ...
2
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0answers
3k views

SMTP Auth - SASL on Dovecot, Postfix and CentOS 6.2 (and Open-Xchange)

I am trying to get open SASL to work on CentOS 6.2. I followed this tutorial: http://wiki.centos.org/HowTos/postfix_sasl I suspect it works perfectly for CentOS 5.x so all I really need is an update ...
2
votes
0answers
1k views

nsswitch cache and nscd

I have an LDAP directory server installed that stores all the user data in one server and I have an ongoing authentication mechanism using pam to request user information from it. This works very ...
2
votes
3answers
1k 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: ...
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5answers
2k views

How to securely automate running commands as root with “sudo su -”?

hint (on client side, how to encrypt files/pwd's): # encrypt pwd with ssh key: openssl rsa -in ~/.ssh/id_rsa -outform pem > ~/.ssh/TEMP-id_rsa.pem 2>/dev/null openssl rsa -in ~/.ssh/id_rsa ...
1
vote
2answers
2k views

Why do my sshd logs show many trys on invalid ports?

My ssh daemon is setup to listen on port 2221. I have also disabled root login from ssh. I don't understand why in auth.log I have attempts to log on other ports (example with 4627 here). May 17 ...
1
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1answer
84 views

basic explanation on NSS , LDAP and PAM

can anyone give me a basic explanation on what are NSS , LDAP and PAM and what they used for and what is their relationship/differences ?
1
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2answers
172 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
1answer
9k views

Execute a script automatically through pbrun?

There is a Unix environment named sftwrk01, uatwrk01, intwrk01 and some more I need to check the logs in each environment everyday by login in as below (through pbsu which is a wrapper for pbrun): ...
1
vote
1answer
84 views

Dynamic password authentication

I would like to know how can I (and if it's possible) create a dynamic authentication for a user in linux. The server would change the user password periodically and the user would use a program ...
1
vote
1answer
184 views

Connecting to Github from server

I am trying to connect to Github from a server running Jenkins. To do this, I'm copying my public key from another server, into the authorized_keys on the new server. All I'm getting is the ...
1
vote
1answer
156 views

SSH Authentication Mechanism

Doing a personal research project and I'm wondering: Why does SSH do its own mechanism negotiation rather than use SASL? At first I thought it might be to ensure confidentiality of the whole session, ...
1
vote
1answer
3k views

How to authenticate a user with PAM, that is not the user that started the application

I'm currently developing an authentication module for an application. The decision was made to do this by using PAM. I have made this work but it can only authenticate the user that started the ...
1
vote
2answers
305 views

Command-line web browser with Kerberos authentication?

QUESTION: Is there a Kerberos-friendly web browser usable via an SSH console? I have tried links but it does not seem to work with Kerberos (the webapp asks me for login/password even though I have a ...
1
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1answer
47 views

Throttle accounts after failed SSH login attempts

I have to set up a server that will allow remote logins. Obviously security is an issue. In this first pass we are discussing:- Locking a person for 15 minutes if they fail to login correctly three ...
1
vote
1answer
38 views

Allow a python application to run if the user's password is wrong

Is it possible to let a python program execute only if a wrong password is given at the login screen of my raspberry pi?
1
vote
1answer
95 views

How to disallow usage of an LDAP root account

I am responsible for a couple of servers at my university. All of these machines are configured to talk to the LDAP server of my departement to allow centralised user logins. On this LDAP server there ...
1
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1answer
29 views

Replacing graphical sudo prompts with sudo command

I'm trying to replace gksudo, pkexec and its ilk with sudo. However, I'm told that using sudo <graphical_program> is a bad idea. Would the following work as a decent replacement? sudo -H ...
1
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2answers
250 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, ...
1
vote
1answer
294 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 ...
1
vote
1answer
370 views

Can't su root after editing PAM confiugration on Rackspace Linux box

I've just hosed a system. Working on pam-ldap on an Ubuntu box, I've run pam-auth-update and told it to override local modifications (which had previously allowed for sudo su, but I was having issues ...
1
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2answers
183 views

Setting up Samba to use AD server for authentication?

I am looking for howtos or instructions on setting up Samba to use an AD server for authentication instead of using a Samba password file. Pointers to documentation helpful, especially the right ...
1
vote
2answers
195 views

ssh fails for an unix server due to dual layer of authentication

I have a server which has dual authentication layer. Meaning first a user has to login to the box using his userid and then use a group id to access the development folder (say). Now I have a script ...
1
vote
1answer
1k views

What strings should I look for in /var/log/auth.log?

I wrote a bash command to scan /var/log/auth.log for messages occurring on the current day indicating unauthorised access. Currently it just fetches messages matching BREAK-IN and unauthorized. What ...
1
vote
1answer
18 views

Directory Server doing lookups on one ldap server and authintication on another ldap server

I have an old Centos Directory Server and a new 389 Directory Server. I don't want to use sssd at the moment so lets keep that suggestion off the table. I do the following my RHEL 6.4 servers: ...
1
vote
1answer
138 views

how to pass a password with a cron job safely?

I have a site map generator script placed in this URL http://www.mydomain.com/admin/sitemapgen/ However this URL is protected with an username and a password in auth_type basic method. I need to ...
1
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1answer
505 views

Cannot login for one user, changing password have no effect

I have change the user's (user1) password using root passwd user1 but when i tried to ssh user@localhost or through gdm or tty it always failed the journalctl log shows Failed password for user1 ...
1
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1answer
92 views

Apache authentication mutiple domain but same subdirectory

I've got several sites: example.com, example1.com, and example2.com in my wordpress. All of them point to my server's /public_html folder, which is my Apache root folder. What do I need to add to my ...
1
vote
1answer
62 views

How does the authentication process with the salted hash in shadow work

Does the supplied password during login get converted to a salted hash and then compared to the one in /etc/shadow? /what if the user is in LDAP but not in the shadow file? Would it use kerberos?
1
vote
2answers
222 views

Reset password for regular user who is locked out

I'm a complete noob in Linux and I'm stuck in a situation where I'm logged in an Linux box from putty but on of my colleague, who was trying to login on same machine from his machine blocked my user ...
1
vote
1answer
3k 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
1answer
229 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 ...
1
vote
1answer
312 views

Where would I find where an .htaccess file is located and being used on a Mac OS X Lion server that sets Basic Auth on an Apache server?

I've installed some software, namely, a continuous integration (CI) server (Jenkins) on a Mac Mini running Lion Server. The server, by default, runs from port 8080 on local host via the url: ...
1
vote
1answer
1k views

Failed to sign CSR with the CA root key

I'm trying to implement Mutual Certificate Authentication , I have to be the CA and server at the same time , generate certificates and sign them for users. and I'm following this tutorial which is a ...
1
vote
1answer
979 views

Session terminates immediately after authentication

I have a RedHat 5.3 server with several regular users created. Since last Friday the user "xpto" is getting "Authentication failed" error messages. Tha account isn't locked out. I have reset the ...
1
vote
1answer
92 views

keeping keys on an auxiliary removable drive

It seems that servers are only as secure as the machine that holds the keys and that in turn means the desktop/screensaver password is the line of defence for not only the desktop itself but any ...
1
vote
1answer
232 views

How do I restore authentication for Debian Lenny synaptic package manager?

My neighbor calls me to fix things when his cats walk on his keyboard and cause problems that he can't fix. This time it happened while he was running synaptic package manager. After the reload, ...
1
vote
2answers
926 views

LDAP on openSUSE

I'm trying to run an LDAP server on a openSUSE 12. But I have a couple of doubts. What I whant is this: testing.com with 2 OU (Info and People ). So the right way would be ou=Info,dc=testing,dc=com. ...
1
vote
1answer
511 views

How to protect my anonymity and authenticity in Irc?

I use irssi for playing multiplayer/programming game with random people. Some people take the game a bit too seriously so I want to protect my identity in it. I do not want that someone misuses my ...
1
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0answers
74 views

/private/var socket not created with postfix/dovecot sasl

I'm currently running into a problem I have with my email server. I try to setup Postfix and Dovecot with SASL authentication but I get the following error when I connect with telnet (port 25) to the ...
1
vote
1answer
120 views

Fetch, authenticate, and download a post-install script on FreeBSD

I'm on a fresh FreeBSD install and want to download and run a post-install script from a private BitBucket repo. My fetch attempt returns an authentication error: ~# fetch ...
1
vote
1answer
134 views

What prevents RHEL7 default PAM config's “nullok” option from allowing empty passwords?

The config /etc/pam.d/password-auth is included by several PAM services including sshd. This is its auth stanza: auth required pam_env.so auth sufficient pam_unix.so nullok ...