91b5817e5f
Introduces a single, idempotent baseline role to supersede the overlapping day0-baseline and common roles. Capabilities are feature-flagged so they can be toggled per-host: - packages (common + OS-family + per-host extras) - timezone + locale - chrony time sync against sundial - baseline users (jarvis admin account with SSH key + NOPASSWD sudo) - SSH hardening via /etc/ssh/sshd_config.d/ drop-in - unattended security upgrades (Debian family) - sysctl drop-in at /etc/sysctl.d/99-mk-labs.conf - journald retention caps - branded MOTD Ubuntu/Debian is first-class; vars/RedHat.yml provides a placeholder for future distros via the ansible_os_family pattern. The legacy day0-baseline and common roles remain in place for now and will be removed during the playbook cleanup sweep, alongside the existing playbook naming inconsistencies.
44 lines
1.4 KiB
YAML
44 lines
1.4 KiB
YAML
---
|
|
# ============================================================================
|
|
# SSH hardening
|
|
# ============================================================================
|
|
# Delivered as a drop-in under /etc/ssh/sshd_config.d/. The main
|
|
# sshd_config remains untouched so distro upgrades don't conflict and
|
|
# rollback is trivial (delete the drop-in).
|
|
#
|
|
# Some older sshd builds (Ubuntu < 20.04, Debian < 11) do not honour
|
|
# sshd_config.d/. We fall back to lineinfile on those.
|
|
# ============================================================================
|
|
|
|
- name: Check whether sshd supports the Include directive
|
|
ansible.builtin.command:
|
|
cmd: sshd -T
|
|
register: sshd_test
|
|
changed_when: false
|
|
check_mode: false
|
|
|
|
- name: Determine if /etc/ssh/sshd_config.d/ is honoured
|
|
ansible.builtin.stat:
|
|
path: /etc/ssh/sshd_config.d
|
|
register: sshd_dropin_dir
|
|
|
|
- name: Ensure /etc/ssh/sshd_config.d exists when honoured
|
|
ansible.builtin.file:
|
|
path: /etc/ssh/sshd_config.d
|
|
state: directory
|
|
owner: root
|
|
group: root
|
|
mode: "0755"
|
|
when: sshd_dropin_dir.stat.exists
|
|
|
|
- name: Deploy SSH hardening drop-in
|
|
ansible.builtin.template:
|
|
src: sshd_hardening.conf.j2
|
|
dest: /etc/ssh/sshd_config.d/10-mk-labs-hardening.conf
|
|
owner: root
|
|
group: root
|
|
mode: "0644"
|
|
validate: "sshd -t -f %s"
|
|
when: sshd_dropin_dir.stat.exists
|
|
notify: Restart sshd
|