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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66 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 ...
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1answer
36 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 ...
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0answers
112 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 ...
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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
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1answer
97 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 ...
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1answer
260 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 ...
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0answers
150 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 ...
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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
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1answer
560 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
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1answer
78 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
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0answers
181 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 ...
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0answers
27 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 ...
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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
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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
215 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
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1answer
932 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
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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
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3answers
288 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
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1answer
285 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
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0answers
208 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, ...
10
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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) ...
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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 ...
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0answers
194 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 ...
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0answers
97 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 ...
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0answers
230 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 ...
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1answer
348 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 ...
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0answers
250 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: ...
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0answers
106 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
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0answers
26 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
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1answer
292 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
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1answer
43 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, ...
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0answers
523 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
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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
331 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
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0answers
434 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
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1answer
257 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
551 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 ...
1
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2answers
3k views

Configuring vsftpd to authenticate with Active Directory

We are trying to give vsftpd access to some Active Directory users. Here are some configuration file contents: # egrep -v '^(#.*|)$' vsftpd.conf anonymous_enable=YES local_enable=YES ...
0
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0answers
136 views

Writing vsftpd logs to a database

I found this useful post relating this topic: http://www.supertom.com/code/vsftpd_mysql_syslog_configuration.html Unfortunately it is not a tutorial but kind of a notepad for the author. After some ...
3
votes
1answer
226 views

Virtual users in sshd from a postgres database

I have a Postgresql database full of user accounts, and i would like to allow these user to access a server through ssh, using only public keys authentification. So far, i have setup these parts on ...
0
votes
0answers
194 views

Mounting EncFS with PAM at SSH login with password protected key

I'm running OpenSUSE 12.3 on a VM in the cloud and have an EncFS directory set up. I can mount it manually fine. I'm trying to have the directory mounted at SSH login, ideally only for the duration ...
0
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0answers
471 views

Netatalk authentication randomly fails over WiFi

Background info: I have an Ubuntu 12.04 server on which I have Samba (v3.6.3) and Netatalk (v3.1.0) installed. I use TimeMachine on my Mac to backup to the Ubuntu server over AFP provided by ...
1
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0answers
251 views

postgresql: invalid authentication method “pam”: not supported by this build

When I try to start postgresql 9.3.1 I receive this in startup log: # cat /var/lib/pgsql/pgstartup.log LOG: could not create IPv6 socket: Address family not supported by protocol LOG: invalid ...
1
vote
1answer
602 views

pam_cracklib reports bad password correctly but pam_unix module STILL changes the password

I am currently trying to use pam_cracklib which properly fails according to my debug.log but even though it is setup as a password requisite entry in my PAM config file, it still falls through to the ...
1
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3answers
4k 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
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1answer
627 views

Authenticate Radius user using pam and ssh [duplicate]

I am able to authenticate radius users using radius server+pam+ssh with creating local user with blank password in linux. Is it possible to authenticate radius users without creating users in local ...
0
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1answer
283 views

PAM exec stdout issue

I am having an issue with a dead simple python script; called with pam_exec. I added a line at the end of that file /etc/pam.d/common-session : session optional pam_exec.so /bin/python ...
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0answers
199 views

OpenLDAP on ArchLinux users cannot change passwd

I started an office and i NEED centralized login and home directories to work. Since all workstations are going to run Arch and problems with different LDAP versions I finally concluded the LDAP ...
0
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1answer
732 views

Can't login with KDM and SSSD but works fine from console

I have LDAP authentication set up with SSSD and I can login fine through console and ssh. However when I try to login through KDM it just says authentication failure... More specifically: Jan 9 ...
0
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1answer
288 views

OpenLDAP client configuration. Can search but cannot login?

I'm trying to set up LDAP on a Gentoo workstation to authenticate against a central server. However, I encountered some issues and I really hope you guys can help me out here :) First off, the LDAP ...