Pluggable authentication modules, a flexible framework for configuring authentication, most commonly the login component of Linux systems, but used in other components and operating systems.

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4
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2answers
1k views

vsftpd - PAM - MySQL and pam_mkhomedir to create directories

I've been successfully using vsftpd with virtual users connecting with PAM to my mysql DB. Now I'd like to automate creation of user directories with successful vsftpd connection. Here is ...
0
votes
1answer
9 views

How can I change the directory in wich pam_mkhomedir creates the user's home directories?

I am using pam_mkhomedir to automatically create user's home directories when they first log in. However, the home directories are created inside the /home directory, while i need them to be created ...
0
votes
1answer
998 views

How does changes in /etc/pam.d/common-session-noninteractive affect fail2ban and possibly other programs/services?

Fail2Ban on Ubuntu 10.04 Configuration files /etc/fail2ban/jail.local [DEFAULT] ignoreip = 127.0.0.1 bantime = 10 # made for test purposes maxretry = 3 backend = polling destemail = ...
3
votes
1answer
1k views

Account Lockout with pam_faillock in RHEL6

Previously, I asked about using pam_tally2 under RHEL6. I would like to pose this question and answer to document the recommended use of pam_faillock over pam_tally2 for the same function; What is ...
0
votes
0answers
14 views

OpenLDAP with GOSA² Host-Authentication (accessTo attribute of User)

i'm having a problem with rebuilding our LDAP in combination with GOSA². We are hosting several linux machines and not all users may have access to all of them. In the past we realized this as a ...
14
votes
2answers
1k views

How to prevent users from extending their window of valid login

Been working on some security hardening procedures for a RedHat box, and I wanted to know if would be possible to prevent a user from changing his password, once it's expired. For one of our clients ...
2
votes
1answer
1k views

vsftpd with pam_winbind.so

I'm trying to setup vsftpd to use logins from our domain. I want the ftp users to be able to login using their active directory username/password and have be able to have full access to ...
1
vote
1answer
33 views

Check if account is allowed when using pam_access

I'm using pam_access and /etc/security/access.conf to restrict who can login to my Rhel 6.5 hosts. I have an LDAP server with a diverse user base, and the security people would like a list of who can ...
0
votes
1answer
25 views

migrate samba users to new server

I've read How to migrate Samba User Accounts to a new linux server? however it doesn't address my situation, or at least not with a solution. I have a RHEL 5 machine, wood, running Samba, Dovecot, ...
1
vote
2answers
151 views

Sending automatic mail on ssh-login fails

I'm trying to let my server send me automatically an email on ssh-login. What I've done: Created a login-notify.sh file (user root, group root, chmod 755) and placed it inside /etc/ssh/ #!/bin/sh ...
0
votes
1answer
623 views

pam_tally2 being called before Password entry

Based on the suggestion given in: Account Lockout with pam_tally2 in RHEL6 I have come to a working configuration, wherein account is getting locked out after 3 failed logins. Catch is that ...
0
votes
1answer
79 views

Can you use LDAP and PAM to implement a restricted shell?

Can you use LDAP and PAM to implement a restricted shell and control those users via groups on the LDAP DC? I would like to do this for several Red Hat, Solaris and Ubuntu servers? Thanks!
2
votes
4answers
237 views

PAM, RADIUS, Google Authenticator and Two Factor Auth

I have setup FreeRADIUS, PAM and the Google Authtenicator. FreeRADIUS calls PAM, which in turn calls the Google pam_google_authenticator.so libary. That all works successfully. However, that's not ...
2
votes
1answer
1k views

pam_unix(sshd:auth): auth could not identify password for [admin] - sshd[6968]?

Why is the following log produced? pam_unix(sshd:auth): auth could not identify password for [admin] - sshd[6968] Is it because of a timeout, or is there some other reason?
2
votes
2answers
932 views

Linux ldap authentication, pam_filter ignored

I've set up linux client authentication via ldap, it works. I want to control user's access to several services by adding or removing different OUs for accounts. E.g., if user is allowed to login ...
3
votes
1answer
20 views

Use more complex AND/OR structure with PAM

PAM allows to use sufficent and required for some logic, like auth sufficient pam_a.so auth required pam_b.so auth required pam_c.so which would mean "either a is true, or b must be true and then c ...
1
vote
1answer
2k views

libpam-ldapd not looking for secondary groups

I'm migrating from libpam-ldap to libpam-ldapd. I'm having some trouble gathering the secondary groups from LDAP. On libpam-ldap, I had this on the /etc/ldap.conf file: nss_schema rfc2307bis ...
0
votes
1answer
54 views

Unable to authenticate LDAP client with PAM when pwdReset = TRUE

I have searched tons of webs and tutorials but I couldn't find an answer to my problem. I have set up OpenLDAP 2.4 on a OpenSUSE 12.3 machine with a password policy overlay. The client is a Linux ...
2
votes
1answer
137 views

Fedora 21 pam_sss authentication failure - permission denied

We have configured a OpenLDAP server which is working fine. FreeBSD, Debian, and a WordPress plugin authenticate with no problems. We are configuring Fedora 21 with pam_sss, but we get the following ...
4
votes
4answers
2k views

How to increase max FD limit for a daemon process running under a headless user?

To increase the FD limit for a daemon process running under a headless user on a Ubuntu Linux machine we did following changes in /etc/security/limits.conf soft nofile 10000 hard nofile 10000 We ...
0
votes
1answer
38 views

tacacs+ for Linux authentication/authorization using pam_tacplus

I am using TACACS+ to authenticate Linux users using pam_tacplus.so PAM module and it works without issues. I have modified the pam_tacplus module to meet some of my custom requirements. I know by ...
1
vote
3answers
858 views

Is anyone using access.conf and netgroup authentication with sssd?

I want to be able to authenticate users (via ssh) to specific groups of hosts based on the users' LDAP netgroup membership. The LDAP server is dsee7. The distro is OEL 6.5 with openldap as the client. ...
1
vote
1answer
53 views

vsftpd freezes after failed pam_script authentication

I have an Ubuntu 14.04 server with vsftpd and pam_script installed using apt-get. I've configured vsftpd to use pam_script for virtual user authentication and my /etc/pam.d/vsftpd file looks like ...
1
vote
2answers
66 views

How to filter ldap user logins on linux?

I have several linux servers (ubuntu 12.04) setup to authenticate user logins over an external (to my branch office) LDAP (Novell Edirectory specifically). This is working well, however I am trying to ...
1
vote
1answer
35 views

What's the downside of disabling PAM in OpenSSH if only public-key login is allowed?

/etc/ssh/sshd_config by default has the following line UsePAM yes I read through available documentation and came to the conclusion that PAM is not used if I only use public-key login. What ...
0
votes
0answers
29 views

ProFTPd won't allow me to log in after password change

I've changed a password for one of my users (using passwd username), and now ProFTPd won't allow that user to log in. Other users can still log in as normal. I'm running Ubuntu 14.04 LTS The error ...
0
votes
0answers
60 views

pam_mount not working when logging in from ssh or console

okay so i configured pam_mount on my centos 6 machine as i did on my centos 7 and 5 machines. But when i login locally or via ssh, pam_mount can't mount my home dir. when i login with a local user, ...
2
votes
1answer
100 views

Why is sshd engaging PAM still?

Background/Behavior is: if you ssh to box via and GSSAPI/Kerberos succeeds and you have a local user in /etc/passwd, you login fine per below PAM config. All Good there. But if you don't have a ...
0
votes
1answer
53 views

How to override a user's UID coming from an LDAP directory?

I am trying to setup Linux logins for users in an LDAP directory. The directory contains users which have a UID under 1000 and I believe this is causing problems with logins to those accounts as UID ...
4
votes
4answers
366 views

FreeIPA: prevent local root accessing user accounts

So after asking this question, I've been test-driving FreeIPA as a central authentication source. Managing access to multiple linux system One problem I ran into is that if a user is given local root ...
0
votes
1answer
83 views

pam_mount on centos won't mount cifs

so I have this problem that pam_mount won't mount my cifs home dirs pam_mount has this in /var/log/messages: Feb 3 15:49:18 centosy nslcd[1278]: [3c9869] <passwd="tomas"> (re)loading ...
1
vote
1answer
37 views

Can I configure pam_ldap without configuring nss?

On my servers I have my system users provisioned with Chef and have no desire to expose any additional users to these machines. I would however like to utilize pam for the authentication backend for ...
2
votes
2answers
74 views

Debugging a Postfix Saslauthd PAM-PGsql authentication failure

I've set up pam-pgsql to lookup passwords in my database for Postfix via Saslauthd. I can test credentials using the command line: $ sudo testsaslauthd -u user@email.com -p password 0: NO ...
1
vote
2answers
201 views

Join Red Hat Linux 6 to a Windows Active Directory Domain

I am using Red Hat 6 (for testing purpose) and configure samba with active directory.Red Hat 6 has successfully join with my windows server 2003 domain. By typing the command [root@mainserver /] # ...
0
votes
2answers
101 views

sendmail & sasl auth on CentOS 6

I'm moving a mail server from one CentOS 6 to another. I use sendmail with sasl pam authentication. When I try to send mail it fails because the user is not authenticated and the mail client does not ...
6
votes
2answers
11k views

Account Lockout with pam_tally2 in RHEL6

I am using pam_tally2 to lockout accounts after 3 failed logins per policy, however, the connecting user does not receive the error indicating pam_tally2's action. (Via SSH.) I expect to see on the ...
0
votes
2answers
50 views

Linux smart card authentication

I am using puttysc to authenticate to a remote Linux server with my smart card . But as I understand, this isn't true PKI authentication - puttysc just unlocks the public key and matches it to a user ...
6
votes
3answers
2k views

libpam-ldap or libpam-ldapd?

I'm setting up LDAP authentication on my personal VPS, and Ubuntu has two packages for the same purpose: libpam-ldap and libpam-ldapd. Which should I use?
11
votes
1answer
267 views

What do the OS X authorization mechanisms actually do?

Background  I'm trying to glean a better understanding of the OS X login process, in order to decide the best way for achieving VPN Single Sign On. Please do correct me if I'm wrong, but I believe ...
2
votes
1answer
59 views

fail2ban did not ban anything, regardless of the settings

this is the first time that i did not find a solution here. so, hopefully it can be solved. i've installed a fresh, new ubuntu minimal system (14.04) with ssh on it. Right after that i installed ...
0
votes
0answers
77 views

pam_tally is not supporting user locking after failed attempts on CentOS

After adding the below configurations in /etc/pam.d/system-auth. The user account is not getting locked after multiple failed attempts. As per the below configuration the account should be locked ...
1
vote
2answers
55 views

Configuring PAM with Augeas

I am attempting to use Augeas to configure the files in my /etc/pam.d directory in a default Ubuntu 14.04 install. My goal is to find all nodes that have an argument of either 'nullok' or ...
0
votes
1answer
168 views

Can sssd-ldap authenticate non-posix users?

I am migrating a sealed MSA from using pam_ldap to pam_sss (sssd-ldap). However, pam_sss seems to have having trouble authenticating users without uidNumbers. I had thought changing ...
1
vote
4answers
14k views

kinit & pam_sss: Cannot find KDC for requested realm while getting initial credentials

I have a very similar problem as described in this thread on CentOS 6.3 authenticating against a 2008R2 AD DC. Here is my krb5.conf, I know for a fact that XXXXXXX.LOCAL is the true domain name: ...
0
votes
1answer
198 views

su: Authentication failure

I have Ubuntu 14.04 server on which I can't use anything that relies on su. This manifests in inability to restart services or even switch users. root@ci-web1:~# su - mxx su: Authentication failure ...
2
votes
0answers
137 views

Trying to script rsync using pam_exec

I'm trying to write a bash script that will execute rsync when called by pam_exec. I've tried a couple different ways, and I'm not sure what I'm doing wrong. When I try to run the script at login by ...
0
votes
0answers
57 views

Postgres on OpenSuse doesn't start after update

I tried to upgrade OpenSuse from 12.1 to 13.1 and after 'zypper update' and reboot Postgresql doesn't start. Here is the output of service postgresgl status: postgresql.service - LSB: Start the ...
12
votes
6answers
10k views

pam service(sshd) ignoring max retries

I have vps that I use to run a webserver on, it currently runs ubuntu server 12.04. Since a few weeks I keep getting a lot of errors in my ssh console. 2014 Apr 11 08:41:18 vps847 PAM service(sshd) ...
1
vote
3answers
5k views

ulimit -n not changing - values limits.conf has no effect

I am trying to raise the open file descriptor maximum for all users on an ubuntu machine. This question is somewhat of a follow up to this question. open file descriptor limits.conf setting ...
0
votes
1answer
176 views

imapd-ssl: admin: No such file or directory

I am trying to set up my VPS so I can use Thunderbird IMAP to manage my mails. First, I installed postfix and followed this guide to create an SSL certificate. Then I installed sasl2-bin and ...