dotfiles/ansible/attitude-adjuster/security.yml

# https://www.raspberrypi.org/documentation/configuration/security.md

- hosts: attitude-adjuster
  become: yes
  tasks:

    - name: disable ssh password logins
      lineinfile:
        path: /etc/ssh/sshd_config
        regexp: '^(#\s*)?{{ item }} '
        line: "{{ item }} no"
      notify: reload ssh
      with_items:
        - ChallengeResponseAuthentication
        - PasswordAuthentication
        - UsePAM

    - name: disable pi user
      user:
        name: pi
        password: !

    - name: install ufw and fail2ban
      package:
        name: "{{ item }}"
        state: present
      with_items:
        - ufw
        - fail2ban

    - name: allow access to http, and https
      ufw:
        rule: allow
        name: WWW Full

    - name: limit ssh access
      ufw:
        rule: limit
        name: OpenSSH

    - name: enable ufw
      ufw:
        state: enabled

    - name: create jail.local
      copy:
        content: |
          [sshd]
          enabled = true
        dest: /etc/fail2ban/jail.local
      notify: reload fail2ban

  handlers:

    - name: reload ssh
      service:
        name: ssh
        state: reloaded

    - name: reload fail2ban
      service:
        name: fail2ban
        state: reloaded