--- title: auditd type: docs --- [![Source Code](https://img.shields.io/badge/gitea-source%20code-blue?logo=gitea&logoColor=white)](https://gitea.rknet.org/ansible/xoxys.auditd) [![Build Status](https://img.shields.io/drone/build/ansible/xoxys.auditd?logo=drone&server=https%3A%2F%2Fdrone.rknet.org)](https://drone.rknet.org/ansible/xoxys.auditd) [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg?label=license)](https://gitea.rknet.org/ansible/xoxys.auditd/src/branch/main/LICENSE) Setup the Linux Auditing System. - [Default Variables](#default-variables) - [auditd_action_mail_acct](#auditd_action_mail_acct) - [auditd_admin_space_left_action](#auditd_admin_space_left_action) - [auditd_buffer_size](#auditd_buffer_size) - [auditd_config_immutable](#auditd_config_immutable) - [auditd_exclude_rule_stages](#auditd_exclude_rule_stages) - [auditd_failure_mode](#auditd_failure_mode) - [auditd_filter_rules_default](#auditd_filter_rules_default) - [auditd_filter_rules_extra](#auditd_filter_rules_extra) - [auditd_main_rules_default](#auditd_main_rules_default) - [auditd_main_rules_extra](#auditd_main_rules_extra) - [auditd_max_log_file](#auditd_max_log_file) - [auditd_max_log_file_action](#auditd_max_log_file_action) - [auditd_num_logs](#auditd_num_logs) - [auditd_optional_rules_default](#auditd_optional_rules_default) - [auditd_optional_rules_extra](#auditd_optional_rules_extra) - [auditd_refuse_manual_stop](#auditd_refuse_manual_stop) - [auditd_space_left_action](#auditd_space_left_action) - [Dependencies](#dependencies) --- ## Default Variables ### auditd_action_mail_acct #### Default value ```YAML auditd_action_mail_acct: root ``` ### auditd_admin_space_left_action #### Default value ```YAML auditd_admin_space_left_action: halt ``` ### auditd_buffer_size #### Default value ```YAML auditd_buffer_size: 8192 ``` ### auditd_config_immutable The auditd daemon is configured to use the augenrules program to read audit rules during daemon startup (the default), use this option to make the auditd configuration immutable. #### Default value ```YAML auditd_config_immutable: false ``` ### auditd_exclude_rule_stages There is a set of pre-defined rule stages you can exclude if needed. Availabe stages: 10-start.rules, 11-self-audit.rules, 12-filter.rules, 30-main.rules, 50-optional.rules, 90-finalize #### Default value ```YAML auditd_exclude_rule_stages: [] ``` #### Example usage ```YAML auditd_exclude_rule_stages: - 10-start.rules - 90-finalize ``` ### auditd_failure_mode Possible values: 0 (silent) | 1 (printk, print a failure message) | 2 (panic, halt the system) #### Default value ```YAML auditd_failure_mode: 1 ``` ### auditd_filter_rules_default #### Default value ```YAML auditd_filter_rules_default: - comment: Ignore current working directory records rule: -a always,exclude -F msgtype=CWD - comment: Ignore EOE records (End Of Event, not needed) rule: -a always,exclude -F msgtype=EOE - comment: Cron jobs fill the logs with stuff we normally don't want rule: - -a never,user -F subj_type=crond_t - -a exit,never -F subj_type=crond_t - comment: This is not very interesting and wastes a lot of space if the server is public facing rule: -a always,exclude -F msgtype=CRYPTO_KEY_USER - comment: High Volume Event Filter rule: - -a exit,never -F arch=b32 -F dir=/dev/shm -k sharedmemaccess - -a exit,never -F arch=b64 -F dir=/dev/shm -k sharedmemaccess - -a exit,never -F arch=b32 -F dir=/var/lock/lvm -k locklvm - -a exit,never -F arch=b64 -F dir=/var/lock/lvm -k locklvm ``` ### auditd_filter_rules_extra #### Default value ```YAML auditd_filter_rules_extra: [] ``` #### Example usage ```YAML auditd_filter_rules_extra: - comment: Ignore current working directory records # defaults to not set rule: '-a always,exclude -F msgtype=CWD' # can be list or string state: present # defaults to present ``` ### auditd_main_rules_default #### Default value ```YAML auditd_main_rules_default: - comment: CIS 4.1.3.1 - Changes to system administration scope rule: - -w /etc/sudoers -p wa -k actions - -w /etc/sudoers.d/ -p wa -k actions - comment: CIS 4.1.3.4 - Events that modify date and time information rule: - -a always,exit -F arch=b64 -S adjtimex,settimeofday,clock_settime -k time_change - -a always,exit -F arch=b32 -S adjtimex,settimeofday,clock_settime,stime -k time_change - -w /etc/localtime -p wa -k time-change - comment: CIS 4.1.3.5 - Changes to the network environment rule: - -a always,exit -F arch=b64 -S sethostname,setdomainname -k system-locale - -a always,exit -F arch=b32 -S sethostname,setdomainname -k system-locale - -w /etc/issue -p wa -k system-locale - -w /etc/issue.net -p wa -k system-locale - -w /etc/hosts -p wa -k system-locale - -w /etc/sysconfig/network -p wa -k system-locale - -w /etc/sysconfig/network-scripts/ -p wa -k system-locale - comment: CIS 4.1.3.7 - Unsuccessful file access attempts rule: - -a always,exit -F arch=b64 -S creat,open,openat,truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -k access - -a always,exit -F arch=b64 -S creat,open,openat,truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -k access - -a always,exit -F arch=b32 -S creat,open,openat,truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -k access - -a always,exit -F arch=b32 -S creat,open,openat,truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -k access - comment: CIS 4.1.3.8 - Modify user/group information rule: - -w /etc/group -p wa -k identity - -w /etc/passwd -p wa -k identity - -w /etc/gshadow -p wa -k identity - -w /etc/shadow -p wa -k identity - -w /etc/security/opasswd -p wa -k identity - comment: CIS 4.1.3.9 - Discretionary access control permission modifications rule: - -a always,exit -F arch=b64 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -F key=perm_mod - -a always,exit -F arch=b64 -S chown,fchown,lchown,fchownat -F auid>=1000 -F auid!=unset -F key=perm_mod - -a always,exit -F arch=b32 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -F key=perm_mod - -a always,exit -F arch=b32 -S lchown,fchown,chown,fchownat -F auid>=1000 -F auid!=unset -F key=perm_mod - -a always,exit -F arch=b64 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod - -a always,exit -F arch=b32 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod - comment: CIS 4.1.3.10 - Successful file system mounts rule: - -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=4294967295 -k mounts - -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=4294967295 -k mounts - comment: CIS 4.1.3.11 - Session initiation information rule: - -w /var/run/utmp -p wa -k session - -w /var/log/wtmp -p wa -k logins - -w /var/log/btmp -p wa -k logins - comment: CIS 4.1.3.12 - Login and logout events rule: - -w /var/log/lastlog -p wa -k logins - -w /var/log/tallylog -p wa -k logins - -w /var/run/faillock -p wa -k logins - comment: CIS 4.1.3.13 - File deletion events by users rule: - -a always,exit -F arch=b64 -S unlink,unlinkat,rename,renameat -F auid>=1000 -F auid!=unset -k delete - -a always,exit -F arch=b32 -S unlink,unlinkat,rename,renameat -F auid>=1000 -F auid!=unset -k delete - comment: CIS 4.1.3.14 - Changes to the Mandatory Access Controls rule: - -w /etc/selinux/ -p wa -k MAC-policy - -w /usr/share/selinux/ -p wa -k MAC-policy - comment: CIS 4.1.3.19 - Kernel module loading unloading and modification rule: - -a always,exit -F arch=b64 -S finit_module,create_module,query_module -F auid>=1000 -F auid!=unset -k kernel_modules - -a always,exit -F arch=b32 -S finit_module,create_module,query_module -F auid>=1000 -F auid!=unset -k kernel_modules - -a always,exit -F arch=b64 -S init_module,delete_module -k kernel_modules - -a always,exit -F arch=b32 -S init_module,delete_module -k kernel_modules - -a always,exit -F path=/usr/bin/kmod -F perm=x -F auid>=1000 -F auid!=unset -k kernel_modules ``` ### auditd_main_rules_extra #### Default value ```YAML auditd_main_rules_extra: [] ``` ### auditd_max_log_file Maximum size of a single logfile (MB) #### Default value ```YAML auditd_max_log_file: 10 ``` ### auditd_max_log_file_action #### Default value ```YAML auditd_max_log_file_action: rotate ``` ### auditd_num_logs Number of logs to keep #### Default value ```YAML auditd_num_logs: 5 ``` ### auditd_optional_rules_default #### Default value ```YAML auditd_optional_rules_default: [] ``` ### auditd_optional_rules_extra #### Default value ```YAML auditd_optional_rules_extra: [] ``` ### auditd_refuse_manual_stop This option prevents auditd from performing change/restart actions at runtime and requires a reboot instead. For security reasons, this option should only be disabled for testing purposes. #### Default value ```YAML auditd_refuse_manual_stop: true ``` ### auditd_space_left_action #### Default value ```YAML auditd_space_left_action: email ``` ## Dependencies None.