initial commitHEADmain

3 files changed, 272 insertions, 0 deletions

diff --git a/tasks/cockpit_configure.yaml b/tasks/cockpit_configure.yaml
new file mode 100644
index 0000000..dc93a3d
--- /dev/null
+++ b/tasks/cockpit_configure.yaml
@@ -0,0 +1,105 @@
+- name: remove /etc/nginx/sites-enabled directory
+  file:
+    path: /etc/nginx/sites-enabled
+    state: absent
+
+- name: remove /etc/nginx/sites-available directory
+  file:
+    path: /etc/nginx/sites-available
+    state: absent
+
+- name: remove /var/www/html directory
+  file:
+    path: /var/www/html
+    state: absent
+  ignore_errors: true
+
+- name: ensure /var/www/html directory exists
+  file:
+    path: /var/www/html
+    state: directory
+    mode: '0755'
+    owner: www-data
+    group: www-data
+
+- name: set directory permissions to 755
+  ansible.builtin.file:
+    path: /var/www/html/
+    recurse: yes
+    state: directory
+    mode: '0755'
+    owner: www-data
+    group: www-data
+
+- name: ensure /etc/cockpit directory exists
+  file:
+    path: /etc/cockpit
+    state: directory
+    mode: '0755'
+    owner: root
+    group: root
+
+- name: create /etc/systemd/system/cockpit.socket.d directory
+  file:
+    path: /etc/systemd/system/cockpit.socket.d
+    state: directory
+    mode: '0755'
+    owner: root
+    group: root
+
+- name: ensure /etc/NetworkManager/conf.d/ directory exists
+  file:
+    path: /etc/NetworkManager/conf.d/
+    state: directory
+    mode: '0755'
+    owner: root
+    group: root
+
+- name: set up systemd cockpit socket override.conf
+  copy:
+    src: files/cockpit.socket.override.conf
+    dest: /etc/systemd/system/cockpit.socket.d/override.conf
+    mode: '0644'
+
+- name: generate /etc/cockpit/cockpit.conf
+  template:
+    src: templates/cockpit.conf.j2
+    dest: /etc/cockpit/cockpit.conf
+    owner: root
+    group: root
+    mode: '0644'
+
+- name: generate /etc/nginx/nginx.conf from template
+  template:
+    src: templates/nginx.conf.j2
+    dest: /etc/nginx/nginx.conf
+    owner: root
+    group: root
+    mode: '0644'
+
+- name: fix packagekit offline with dummy network interface
+  copy:
+    dest: /etc/NetworkManager/conf.d/10-globally-managed-devices.conf
+    content: |
+        [keyfile]
+        unmanaged-devices=none
+
+- name: create dummy network intereface
+  command: nmcli con add type dummy con-name fake ifname fake0 ip4 1.2.3.4/24 gw4 1.2.3.1
+
+- name: reload systemd daemon
+  command: systemctl daemon-reload
+
+- name: restart cockpit service
+  systemd:
+    name: cockpit.service
+    state: restarted
+    enabled: true
+  when: ansible_service_mgr == 'systemd'
+
+- name: restart nginx service
+  systemd:
+    name: nginx
+    state: restarted
+    enabled: true
+  when: ansible_service_mgr == 'systemd'
diff --git a/tasks/harden.yaml b/tasks/harden.yaml
new file mode 100644
index 0000000..2cdb15b
--- /dev/null
+++ b/tasks/harden.yaml
@@ -0,0 +1,151 @@
+- name: update apt packages
+  apt:
+    update_cache: true
+
+- name: install apt packages
+  apt:
+    name: "{{ apt_packages }}"
+    state: present
+    update_cache: true
+  environment:
+    DEBIAN_FRONTEND: noninteractive
+
+- name: clear /etc/issue and /etc/motd
+  copy:
+    content: ""
+    dest: "{{ item }}"
+  loop:
+    - /etc/issue
+    - /etc/motd
+
+- name: check if /etc/update-motd.d directory exists
+  stat:
+    path: /etc/update-motd.d
+  register: motd_dir
+
+- name: find files in /etc/update-motd.d
+  find:
+    paths: /etc/update-motd.d
+    file_type: file
+  register: motd_files
+  when: motd_dir.stat.exists
+
+- name: remove execute permissions from all files in /etc/update-motd.d
+  file:
+    path: "{{ item.path }}"
+    mode: u-x,g-x,o-x
+  loop: "{{ motd_files.files }}"
+  when: motd_dir.stat.exists
+
+- name: enforce root-only cron/at
+  file:
+    path: "{{ item }}"
+    state: touch
+    owner: root
+    group: root
+    mode: '0600'
+  loop:
+    - /etc/cron.allow
+    - /etc/at.allow
+
+- name: remove deny files for cron and at
+  file:
+    path: "{{ item }}"
+    state: absent
+  loop:
+    - /etc/cron.deny
+    - /etc/at.deny
+
+- name: backup sshd_config
+  copy:
+    src: /etc/ssh/sshd_config
+    dest: "/etc/ssh/sshd_config.bak_{{ ansible_date_time.iso8601_basic }}"
+    remote_src: true
+
+- name: harden sshd_config
+  copy:
+    dest: /etc/ssh/sshd_config
+    content: |
+      Port 22
+      Banner /etc/issue
+      UsePAM yes
+      Protocol 2
+      Subsystem sftp /usr/lib/openssh/sftp-server
+      LogLevel verbose
+      PrintMotd no
+      #AcceptEnv LANG LC_*
+      MaxSessions 5
+      StrictModes yes
+      Compression no
+      MaxAuthTries 3
+      IgnoreRhosts yes
+      PrintLastLog yes
+      AddressFamily inet
+      X11Forwarding no
+      PermitRootLogin yes
+      AllowTcpForwarding yes
+      ClientAliveInterval 1200
+      AllowAgentForwarding no
+      PermitEmptyPasswords no
+      ClientAliveCountMax 0
+      GSSAPIAuthentication no
+      KerberosAuthentication no
+      IgnoreUserKnownHosts yes
+      PermitUserEnvironment no
+      ChallengeResponseAuthentication no
+      MACs hmac-sha2-512,hmac-sha2-256
+      Ciphers aes128-ctr,aes192-ctr,aes256-ctr
+
+- name: regenerate SSH host keys
+  shell: |
+    rm -f /etc/ssh/ssh_host_*key*
+    ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -N ""
+    ssh-keygen -t rsa -b 4096 -f /etc/ssh/ssh_host_rsa_key -N ""
+  args:
+    creates: /etc/ssh/ssh_host_ed25519_key
+
+- name: restart ssh
+  systemd:
+    name: ssh
+    state: restarted
+    enabled: true
+  when: ansible_service_mgr == 'systemd'
+
+- name: enable unattended-upgrades
+  shell: dpkg-reconfigure --priority=low unattended-upgrades
+  args:
+    creates: /etc/apt/apt.conf.d/50unattended-upgrades
+
+- name: restart unattended-upgrades
+  systemd:
+    name: unattended-upgrades
+    state: restarted
+    enabled: true
+  when: ansible_service_mgr == 'systemd'
+
+- name: disable ipv6 in grub
+  lineinfile:
+    path: /etc/default/grub
+    regexp: '^GRUB_CMDLINE_LINUX='
+    line: 'GRUB_CMDLINE_LINUX="ipv6.disable=1"'
+
+- name: update grub
+  command: update-grub
+
+- name: allow ssh port and enable ufw
+  ufw:
+    rule: allow
+    port: 22
+    proto: tcp
+
+- name: enable ufw
+  ufw:
+    state: enabled
+    policy: deny
+
+- name: restart ufw
+  systemd:
+    name: ufw
+    state: restarted
+    enabled: true
+  when: ansible_service_mgr == 'systemd'
diff --git a/tasks/preflight.yaml b/tasks/preflight.yaml
new file mode 100644
index 0000000..3358d46
--- /dev/null
+++ b/tasks/preflight.yaml
@@ -0,0 +1,16 @@
+- name: ensure script is run as root
+  assert:
+    that:
+      - ansible_effective_user_id == 0
+    fail_msg: "this playbook must be run as root"
+
+- name: check if system is debian-based
+  command: dpkg -l
+  register: dpkg_check
+  changed_when: false
+  failed_when: false
+
+- name: fail if not debian-based
+  fail:
+    msg: "distribution not Debian-based"
+  when: dpkg_check.rc != 0