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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5
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2answers
337 views

Logins take a long time

After upgrading to Debian 7.4 password authentication from any service take a long time. This is true for SSH logins, sudo'ing and authentication with dovecot (which is configured to use PAM). I am ...
1
vote
1answer
63 views

Is it possible to have one group or account authenticate locally, bypassing LDAP auth?

We have one RAC cluster of machines where the local UID:GID of a couple users (oracle and grid) do not match the UID:GID of those same users in LDAP. Ultimately we ought to change the UID and GID of ...
1
vote
0answers
1k views

passwd: Authentication token manipulation error

I am running a Ubuntu 12 machine, and have recently been working to secure it. I made all the changes from this guide. I am not running a Linode, but I used these as a starting point for setting up ...
1
vote
3answers
718 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. ...
0
votes
1answer
351 views

Mounting NFS shares with pam_mount module

I am setting up a classroom environment where Windows 2012 R2 Server is used as a domain controller and file server. All the clients will be Kubuntu 14.04. I have set up the domain and NFS shares ...
2
votes
0answers
384 views

RHEL 6.5 web application PAM AUTH pam_oddjob_mkhomedir

I've got a RHEL 6.5 that authenicates against an AD server, that side is working fine. The machine is also running a web application that uses a PAM module to authenticate. I copied login to make a ...
1
vote
1answer
39 views

How can I verify that my PAM configuration works as expected

I'm trying to setup a vsftpd server in a virtual machine and all I can ever get from it is an authentication error (530 Login incorrect). Since I've tried to configure it using virtual users with PAM, ...
0
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0answers
227 views

LDAP: forced to change root password on every login

I have finally configured my new server as LDAP-client of my existing one. Now, every time I login as root, I am prompted to change my 'LDAP password': login as: root root@111.111.111.111's password: ...
0
votes
1answer
347 views

PAM Authentication with LDAP on Debian Jessie Not Finding LDAP Users

Debian Jessie (specifically, Debian Server Wheezy x64 with testing repos) OpenLDAP 2.4.39 libpam-ldapd 0.9.4-1 Upon installing libpam-ldapd, the dpkg configuration asked for my LDAP address ...
0
votes
0answers
59 views

pam_exec not working for auth?

Here's my PAM configuration file: #%PAM-1.0 auth requisite pam_exec.so seteuid /srv/auth/pam_auth_user.py Here's /srv/auth/pam_auth_user.py (I've run chmod +x and chown root:root on it): ...
2
votes
3answers
82 views

is there a PAM module for DNSBL lookups?

I have been enumerating the remaining security concerns on one of my back-end production servers, when I came to the realization that something which could be incredibly useful was missing from my ...
1
vote
1answer
573 views

Token error when trying to change password through pam-mysql

I am currently preparing a machine for a web hosting service, and I decided to use MySQL to store all our users (since the rest of our services use it already). For that, I am using libnss-mysql and ...
0
votes
1answer
160 views

Pam-Mysql “Can't initialize threads: error 11”

Inside a Debian OpenVZ container, I have 2 OpenVPN servers (udp on port 53 and tcp on port 443). The authentication is based on Pam-Mysql. Inside my OpenVPN conf file I have: [...] plugin ...
1
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0answers
79 views

pam_exec not working? cannot allocate 2 bytes?

I am trying to run a script during the login process using PAM and libpam_exec; I have added this line to the desired file under /etc/pam.d/: auth required pam_exec.so debug log=/var/log/debug ...
1
vote
1answer
37 views

skip 2 steps verification when there is ssh key Debian [closed]

I had installed 2 steps verification on my server using this great manual: http://support.jpgottech.com/knowledgebase.php?article=72 Everything works great but I had encountered a small issue, I want ...
0
votes
0answers
123 views

enforce password length on ubuntu with pam_cracklib

I was trying to enforce password length to a minimum of 10 using pam_cracklib. here is my /etc/pam.d/common-password password requisite pam_cracklib.so retry=3 minlen=10 ...
0
votes
0answers
21 views

Multiple server with Pam radius?

I have an issue with Pam radius . I want to use two radius servers at same time with different databases with Pam_radius I use Open-connect which use Pam authentication . in ...
2
votes
1answer
104 views

pam_tally2 causing unwanted lockouts with SCOM or Nervecenter

We use pam_tally2 in our system-auth config file which works fine for users. With services such as SCOM or Nervecenter it causes lockouts. Same behavior on RHEL5 and RHEL6 This is ...
1
vote
1answer
309 views

Why does debian not set the pam module called pam_limits.so in the file /etc/pam.d/su

I am using debian version 7.4 The /etc/pam.d/su file there does not enable pam_limits.so the snippet is: # Sets up user limits, please uncomment and read /etc/security/limits.conf # to enable ...
0
votes
0answers
160 views

Red Hat 6.5 - Login Errors After Security Hardening

I followed the information below, however, it is strangely blocking me from entering a password upon entering the login prompt on the server: To configure the system to lock out accounts after a ...
0
votes
0answers
41 views

Getting PAM/user info into php - something like Net_Finger instead of a db?

I've got a very small user group who just need to login, upload, check and then move specific files to a different area when ready. Right now, I use the nginx PAM auth module to log them in against ...
3
votes
1answer
638 views

Understanding PAM authentication procedure on FreeBSD with security/sssd

I'm trying to understand what's behaving errantly on my PAM configuration on FreeBSD 10.0 The machine is configured with two different authentication realms, one is the default Unix authentication ...
1
vote
1answer
81 views

On Solaris, can I create a user account in a single command line entry that is not disabled, but is password disabled (only allows SSH)

I am building a script for SA's to follow when performing a certain task. That task requires adding a user to a system that can only SSH to the system (using a key) and not log in with a password. ...
0
votes
0answers
184 views

authenticating and authorizing linux users kept in mysql database using pam and nss

I am not able to authenticate and authorize users present in my mysql database. If someone can point out where I am wrong it would be very helpful.Following are the steps that I followed. Firstly I ...
0
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0answers
28 views

Linux PAM auth chain w/ module independence

I have a working PAM configuration using google_authentitcator in addition to the standard pam_unix password module as a two factor solution. In short it prompts (requisite) for a verification code ...
0
votes
1answer
1k views

CentOS PAM unable to open /etc/pam.d/system-auth

In gdm I have checked "Require smartcard login" but forgot about adding any smartcard for authentication. Then I've tried to boot from LiveCD and disable SC auth. Something went wrong and now I am not ...
3
votes
1answer
1k views

Public-Key -or- Password & Google Authenticator for SSH Login

I found an article (http://www.howtogeek.com/121650/how-to-secure-ssh-with-google-authenticators-two-factor-authentication/) that explains how to configure OpenSSH to ask for a Google Authenticator ...
6
votes
1answer
239 views

Different “RequiredAuthentications2” for sshd and sftp subsystem

we're currently using a 2factor authentication on our SSH servers, so we have "RequiredAuthentications2 publickey,keyboard-interactive" in our sshd_config (publickey for the key, keyboard-interactive ...
2
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 ...
3
votes
2answers
1k views

OpenSSH and PAM authentication using a public key

I'm looking for a way to authenticate users using a public key which is stored in a db (MongoDB). Similar questions usually resulted with a suggestion to installed a patched version of OpenSSH ...
4
votes
4answers
322 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 ...
3
votes
1answer
301 views

build user chroot on first login

I'm using ldap for remote user authentication and I basically need to either figure out how to: a. chroot a user on machine b from machine a via nfs,(which doesn't seem possible without mounting ...
1
vote
0answers
225 views

How to add two-factor authetntication to ssh?

I am trying to add 2FA to sshd using PAM from oathtool package. I want two ways to login to server: publickey and 2FA, or password and 2FA So far I managed to add 2FA to publickey authentication, ...
12
votes
6answers
9k 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) ...
0
votes
1answer
2k views

How to I authenticate with Dovecot + IMAP + PAM on CentOS?

I set up Dovecot IMAP to use PAM as suggested here: http://wiki2.dovecot.org/PasswordDatabase/PAM PAM/dovecot [root@ip-172-31-15-65 pam.d]# cat dovecot #%PAM-1.0 auth required ...
0
votes
0answers
202 views

Apache + PAM + Winbind slow logins

Since upgrading our old Debian Lenny server to Ubuntu 12.04, we've noticed intermittent slow or failed access to Apache. Many or most web requests work fine, but occasionally, a Subversion client ...
1
vote
0answers
106 views

Centos 6.2 Openwebmail change password issue

Recently build environment to test, install openldap, openwebmail and PAM authentication module After experiencing the current account login webmail change password will be "password is wrong, change ...
0
votes
0answers
242 views

Run pam_exec after home directory creation CentOS 6

How can I make a pam_exec script in /etc/pam.d/sshd run after the home directory has been created? I am on CentOS 6.5 and use network accounts via PBIS / Likewise-Open. Right now, if a new user ...
-1
votes
1answer
378 views

User authentication; PAM or Radius? [closed]

At college I'm part of a group of students that keep a server infrastructure running for the students. Lately we've been having a lot of trouble with the servers, and we decided that it's probably ...
0
votes
0answers
261 views

pam_unix and pam_userdb authentication failure log for VSFTPD

I see this in my /var/log/auth.log file for all the connection to my FTP server : Mar 26 12:30:13 production vsftpd: pam_unix(vsftpd:auth): check pass; user unknown Mar 26 12:30:13 production vsftpd: ...
0
votes
0answers
109 views

OpenLDAP+pam_ldap+ppolicy does not notify user that they are blocked

We have an OpenLDAP server configured to use the password policy overlay in order to lock users when they reach a certain number of failed password attempts. This is working perfectly but when a ...
0
votes
0answers
31 views

libnss-pgsql logging transaction on screen

I've been configuring a pg database to authenticate user against pam. I installed libpam_pgsql and libnss_pgsql2. After I finish configuring the libnss_pgsql2, creating and editing the nss-pgsql.conf ...
1
vote
1answer
304 views

Use a PHP script to authenticate users on Linux

I have a web application running built in PHP using MySQL as database. I'm trying to give specific users access to a Linux system via SSH to perform simple command-line tasks. Since I do already have ...
1
vote
1answer
45 views

is this normal behavior for pam_tty_audit

I've recently configured pam_tty_audit, and while it does log information, it seems like it does not log information until after the user has logged out. Oddly enough, it does log some things live, ...
0
votes
0answers
557 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 ...
1
vote
2answers
1k views

Linux nested groups with winbind

We have several RHEL6 servers connected to Active Directory using winbind. All servers are configured identically using a configuration management tool. Servers however produce different results when ...
5
votes
1answer
372 views

Combination of SSH key auth, and two-factor authentication

I was wondering if it is possible to accomplish the following, all at the same time: Disable root logins Enable SSH login for personal user, only via SSH keys Enable SSH login for unprivileged user, ...
2
votes
0answers
460 views

How to mount share in pam_mount.conf.xml depending of OU

I have a Microsoft Windows domain and I want to add the ubuntu machines with Likewise-Open. There is no problem with that, but in my windows machines I have a GPO that mount a net share depending of ...
1
vote
1answer
268 views

PAM won't authenticate with mysql (make_scrambled_password deprecated)

I have spent some time searching for this and it seems I'm the only one having problem with PAM not authenticating through mysql due to current updates so I thought I will post my problem here and if ...
7
votes
1answer
612 views

Prevent fork bomb inside docker container

I am currently struggling with limiting number of processes for user which I called sandbox. I configured processes limit inside /etc/security/limits.conf like this: sandbox hard nproc ...