ansible-personal/roles/common/tasks/firewall_Debian.yml

---
# Debian 11+ will use nftables directly, with no firewalld.

- block:
  - name: Install Debian firewall packages
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.package:
      name:
        - fail2ban
        - libnet-ip-perl # for aggregate-cidr-addresses.pl
        - nftables
        - python3-systemd
        - curl # for nftables update scripts
      state: present
      cache_valid_time: 3600

  - name: Remove iptables on newer Debian
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.apt:
      pkg: iptables
      state: absent

  - name: Copy nftables.conf
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.template:
      src: nftables.conf.j2
      dest: /etc/nftables.conf
      owner: root
      mode: 0644
    notify:
      - restart nftables
      - restart fail2ban

  - name: Create /etc/nftables extra config directory
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.file:
      path: /etc/nftables
      state: directory
      owner: root
      mode: 0755

  - name: Copy extra nftables configuration files
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.copy:
      src: "{{ item.src }}"
      dest: "/etc/nftables/{{ item.src }}"
      owner: root
      group: root
      mode: 0644
      force: "{{ item.force }}"
    loop:
      - { src: "spamhaus-ipv4.nft", force: "no" }
      - { src: "spamhaus-ipv6.nft", force: "no" }
      - { src: "abusech-ipv4.nft", force: "no" }
      - { src: "abuseipdb-ipv4.nft", force: "yes" }
      - { src: "abuseipdb-ipv6.nft", force: "yes" }
    notify:
      - restart nftables
      - restart fail2ban

  - name: Copy nftables update scripts
    when: ansible_distribution_version is version('11', '>=')
    ansible.builtin.copy:
      src: "{{ item }}"
      dest: "/usr/local/bin/{{ item }}"
      mode: 0755
      owner: root
      group: root
    loop:
      - update-spamhaus-nftables.sh
      - aggregate-cidr-addresses.pl
      - update-abusech-nftables.sh

  - name: Copy nftables systemd units
    when: ansible_distribution_version is version('11', '>=')
    ansible.builtin.copy:
      src: "{{ item }}"
      dest: "/etc/systemd/system/{{ item }}"
      mode: 0644
      owner: root
      group: root
    loop:
      - update-spamhaus-nftables.service
      - update-spamhaus-nftables.timer
      - update-abusech-nftables.service
      - update-abusech-nftables.timer
    register: nftables_systemd_units

  # need to reload to pick up service/timer/environment changes
  - name: Reload systemd daemon
    ansible.builtin.systemd:
      daemon_reload: true
    when: nftables_systemd_units is changed

  - name: Start and enable nftables update timers
    when: ansible_distribution_version is version('11', '>=')
    ansible.builtin.systemd:
      name: "{{ item }}"
      state: started
      enabled: true
    loop:
      - update-spamhaus-nftables.timer
      - update-abusech-nftables.timer

  - name: Start and enable nftables
    when: ansible_distribution_major_version is version('11', '>=')
    ansible.builtin.systemd:
      name: nftables
      state: started
      enabled: true

  - ansible.builtin.include_tasks: fail2ban.yml
    when: ansible_distribution_major_version is version('9', '>=')
  tags: firewall

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