robertdebock.auditd

Ansible Role Auditd

This role helps you install and set up auditd on your system.

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Example Playbook

Here’s a sample playbook from molecule/default/converge.yml that is tested with each code change.

---
- name: Converge
  hosts: all
  become: true
  gather_facts: true

  roles:
    - role: robertdebock.auditd
      auditd_start_service: false
      auditd_local_events: "no"
      auditd_rules:
        - file: /var/log/audit/
          keyname: auditlog
        - file: /etc/audit/
          permissions:
            - write
            - attribute_change
          keyname: auditconfig
        - file: /etc/libaudit.conf
          permissions:
            - write
            - attribute_change
          keyname: auditconfig
        - file: /etc/audisp/
          permissions:
            - write
            - attribute_change
          keyname: audispconfig
        - file: /sbin/auditctl
          permissions:
            - execute
          keyname: audittools
        - file: /sbin/auditd
          permissions:
            - execute
          keyname: audittools
        - syscall: open
          action: always
          filter: exit
          filters:
            - auid!=4294967295
            - auid!=unset
          keyname: my_keyname
          arch: b32
        - syscall: adjtimex
          action: always
          filter: exit
          keyname: time_change
        - syscall: settimeofday
          action: always
          filter: exit
          keyname: time_change
        - action: always
          filter: exit
          filters:
            - path=/bin/ping
            - perm=x
            - auid>=500
            - auid!=4294967295
          keyname: privileged

Before running, ensure your machine is prepared, which in CI is done using molecule/default/prepare.yml:

---
- name: Prepare
  hosts: all
  become: true
  gather_facts: false

  roles:
    - role: robertdebock.bootstrap

See this link for a full guide on using these roles.

Role Variables

Default values for the variables are defined in defaults/main.yml:

---
# Default configuration for auditd

# Documentation for these variables can be found in auditd.conf's man page
# https://linux.die.net/man/5/auditd.conf
auditd_buffer_size: 32768
auditd_fail_mode: 1
auditd_maximum_rate: 60
auditd_enable_flag: 1
auditd_local_events: "yes"
auditd_write_logs: "yes"
auditd_log_file: /var/log/audit/audit.log
auditd_log_group: root
auditd_log_format: RAW
auditd_flush: incremental_async
auditd_freq: 50
auditd_max_log_file: 8
auditd_num_logs: 5
auditd_priority_boost: 4
auditd_disp_qos: lossy
auditd_dispatcher: /sbin/audispd
auditd_name_format: none
auditd_max_log_file_action: rotate
auditd_space_left: "75"  # Can be a number ('25') or a percentage ('25%')
auditd_space_left_action: syslog
auditd_verify_email: "yes"
auditd_action_mail_acct: root
auditd_admin_space_left: 50
auditd_admin_space_left_action: suspend
auditd_disk_full_action: suspend
auditd_disk_error_action: suspend
auditd_use_libwrap: "yes"
auditd_tcp_listen_queue: 5
auditd_tcp_max_per_addr: 1
auditd_tcp_client_max_idle: 0
auditd_enable_krb5: "no"
auditd_krb5_principal: auditd
auditd_distribute_network: "no"

# You can control whether to manage rules with this role.
# Setting auditd_manage_rules to false will stop managing the rules.
auditd_manage_rules: true

# Some rules may require a specific architecture to be set.
auditd_default_arch: b64

# You can choose to start the auditd service or not.
# Useful mainly in CI to prevent starting the service.
auditd_start_service: true