ansible-personal/roles/common/tasks/firewall_Debian.yml
Alan Orth 9bba0d96bb
roles/common: Add initial support for nftables on Debian 11
I will try using nftables directly instead of via firewalld as of
Debian 11 as it is the replacement for the iptables/ipset stack in
recent years and is easier to work with.

This also includes a systemd service, timer, and script to update
the spamhaus DROP lists as nftables sets.

Still need to add fail2ban support.
2021-07-26 13:09:41 +03:00

139 lines
5.0 KiB
YAML

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