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

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---
# Debian 10 will use firewalld with the iptables backend.
# Debian 11 will use nftables directly, with no firewalld.
- block:
- name: Set Debian firewall packages
when: ansible_distribution_major_version is version('10', '<=')
ansible.builtin.set_fact:
debian_firewall_packages:
- firewalld
- tidy
- fail2ban
- python3-systemd # for fail2ban systemd backend
- name: Set Debian firewall packages
when: ansible_distribution_major_version is version('11', '>=')
ansible.builtin.set_fact:
debian_firewall_packages:
- fail2ban
- libnet-ip-perl # for aggregate-cidr-addresses.pl
- nftables
- python3-systemd
- curl # for nftables update scripts
- name: Install firewall packages
ansible.builtin.apt: pkg={{ debian_firewall_packages }} 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: Use iptables backend in firewalld
when: ansible_distribution_major_version is version('10', '==')
ansible.builtin.lineinfile:
dest: /etc/firewalld/firewalld.conf
regexp: '^FirewallBackend=nftables$'
line: 'FirewallBackend=iptables'
notify:
- restart firewalld
- restart fail2ban
# firewalld seems to have an issue with iptables 1.8.2 when using the nftables
# backend. Using individual calls seems to work around it.
# See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931722
- name: Use individual iptables calls
when: ansible_distribution_major_version is version('10', '==')
ansible.builtin.lineinfile:
dest: /etc/firewalld/firewalld.conf
regexp: '^IndividualCalls=no$'
line: 'IndividualCalls=yes'
notify:
- restart firewalld
- restart fail2ban
- name: Copy firewalld public zone file
when: ansible_distribution_major_version is version('10', '<=')
ansible.builtin.template: src=public.xml.j2 dest=/etc/firewalld/zones/public.xml owner=root mode=0600
- name: Format public.xml firewalld zone file
when: ansible_distribution_major_version is version('10', '<=')
command: tidy -xml -iq -m -w 0 /etc/firewalld/zones/public.xml
notify:
- restart firewalld
- restart fail2ban
- name: Copy firewalld ipsets of abusive IPs
when: ansible_distribution_major_version is version('10', '<=')
ansible.builtin.copy: src={{ item }} dest=/etc/firewalld/ipsets/{{ item }} owner=root group=root mode=0600
loop:
- abusers-ipv4.xml
- abusers-ipv6.xml
- spamhaus-ipv4.xml
- spamhaus-ipv6.xml
notify:
- restart firewalld
- restart fail2ban
- name: Copy Spamhaus firewalld update script
when: ansible_distribution_version is version('10', '<=')
ansible.builtin.copy: src=update-spamhaus-lists.sh dest=/usr/local/bin/update-spamhaus-lists.sh mode=0755 owner=root group=root
- name: Copy Spamhaus firewalld systemd units
when: ansible_distribution_version is version('10', '<=')
ansible.builtin.copy: src={{ item }} dest=/etc/systemd/system/{{ item }} mode=0644 owner=root group=root
loop:
- update-spamhaus-lists.service
- update-spamhaus-lists.timer
register: spamhaus_firewalld_systemd_units
- name: Copy Spamhaus 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=yes
when: spamhaus_firewalld_systemd_units is changed or
nftables_systemd_units is changed
- name: Start and enable Spamhaus firewalld update timer
when: ansible_distribution_version is version('10', '<=')
ansible.builtin.systemd: name=update-spamhaus-lists.timer state=started enabled=yes
notify:
- restart firewalld
- restart fail2ban
- name: Start and enable nftables update timers
when: ansible_distribution_version is version('11', '>=')
ansible.builtin.systemd: name={{ item }} state=started enabled=yes
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=yes
- ansible.builtin.include_tasks: fail2ban.yml
when: ansible_distribution_major_version is version('9', '>=')
tags: firewall
# vim: set sw=2 ts=2: