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path: root/roles/sshserver/tasks/main.yml
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---
- name: install ssh-server
  apt:
    name: openssh-server
    state: present

- name: hardening ssh-server config
  lineinfile:
    regexp: "^#?\\s*{{ item.key }}"
    line: "{{ item.key }} {{ item.value }}"
    dest: /etc/ssh/sshd_config
    mode: 0644
  with_dict:
    IgnoreRhosts: "yes"
    PermitRootLogin: "without-password"
    PubkeyAuthentication: "yes"
    HostbasedAuthentication: "no"
    PermitEmptyPasswords: "no"
    UseDNS: "no"
  loop_control:
    label: "{{ item.key }}"
  notify: restart ssh

- name: limit allowed users
  lineinfile:
    dest: /etc/ssh/sshd_config
    regexp: "^AllowUsers"
    line: "AllowUsers {{ ' '.join([ 'root' ] | union(ssh_allowusers_group | default([])) | union(ssh_allowusers_host | default([]))) }}"
  notify: restart ssh

- name: install ssh keys for root
  authorized_key:
    user: root
    key: "{{ ssh_keys_root | join('\n') }}"
    exclusive: yes

- name: delete root password
  user:
    name: root
    password: "!"