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15/03/2018

What Is Linux PAM (Pluggable Authentication)

Authentication is important part of the operations systems like Linux. As Linux operating systems are multi user systems and runs a lot of services and complex scenarios they generally need robust and easy to implement complex scenarios authentication system. Linux Pluggable Authentication a.k.a. Linux PAM is very robust and dynamic authentication system. In this tutorial we will try to explain important aspects of Linux PAM. History In 1995 Open Software...

Blog / CentOS / Debian / Fedora / Linux / Linux / RedHat / Security / Ubuntu

14/03/2017

Access.conf Security Configuration For Linux and Unix

access.conf is the configuration file used to logins to the Linux or Unix systems. This file is locate at /etc/security/ path. With this file logins of users, groups, hosts, tty, network are defined to allows or disallowed status. Each line specifies a rule. Syntax

permission:users/groups:origins

1	permission:users/groups:origins

Show Services Using Access.conf Allow Rule As we stated before each line is a rule. The aim of the rules are allowing or denying access with related...

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11/03/2017

limits.conf File To Limit Users, Process In Linux With Examples

limits.conf configuration file is used to limit user, domain, process related metrics. Limits.conf is related with pam_limits module. Configuration File There is configuration file named limits.conf and located at /etc/security/ . The default content of this file is like below.

#<domain>      <type>  <item>         <value> 
# 
 
#*               soft    core            0 
#root            hard    core            100000 
#*               hard    rss             10000 
#@student        hard    nproc           20 
#@faculty        soft    nproc           20 
#@faculty        hard    nproc           50 
#ftp             hard    nproc           0 
#ftp             -       chroot          /ftp 
#@student        -       maxlogins       4

#<domain> <type> <item> <value>

#* soft core 0

#root hard core 100000

#* hard rss 10000

#@student hard nproc 20

#@faculty soft nproc 20

#@faculty hard nproc 50

#ftp hard nproc 0

#ftp - chroot /ftp

#@student - maxlogins 4

As we can see all configurations are commented so they are not effective. There is also a directory which is use to store configuration files in a separate files to maintain easily. This...

Tagged: pam

What Is Linux PAM (Pluggable Authentication)

limits.conf File To Limit Users, Process In Linux With Examples

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