ansible-roles/evolinux-base/tasks/ssh.yml

---
- debug:
    msg: "Warning: empty 'evolinux_ssh_password_auth_addresses' variable, tasks will be skipped!"
  when: evolinux_ssh_password_auth_addresses == []

- name: Security directives for Evolinux
  blockinfile:
    dest: /etc/ssh/sshd_config
    block: |
      Match Group evolinux-sudo
          PasswordAuthentication no
      Match Address {{ evolinux_ssh_password_auth_addresses | join(',') }}
          PasswordAuthentication yes
    marker: "# {mark} EVOLINUX PASSWORD RESTRICTIONS"
    insertafter: EOF
    validate: '/usr/sbin/sshd -T -f %s'
  notify: reload sshd
  when: not evolinux_ssh_password_auth_addresses == []

# We disable AcceptEnv because it can be a security issue, but also because we
# do not want clients to push their environment variables like LANG.
- name: disable AcceptEnv in ssh config
  replace:
    dest: /etc/ssh/sshd_config
    regexp: '^AcceptEnv'
    replace: "#AcceptEnv"
  notify: reload sshd
  when: evolinux_ssh_disable_acceptenv

- name: Set log level to verbose (for Debian >= 9)
  replace:
    dest: /etc/ssh/sshd_config
    regexp: '^#?LogLevel [A-Z]+'
    replace: "LogLevel VERBOSE"
  notify: reload sshd
  when: ansible_distribution_major_version | version_compare('9', '>=')

- meta: flush_handlers