Alan Orth
9bba0d96bb
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.
139 lines
5.0 KiB
YAML
139 lines
5.0 KiB
YAML
---
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# Debian 11 will use nftables directly, with no firewalld.
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- block:
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- name: Set Debian firewall packages
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when: ansible_distribution_major_version is version('10', '<=')
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set_fact:
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debian_firewall_packages:
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- firewalld
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- tidy
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- fail2ban
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- python3-systemd # for fail2ban systemd backend
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- name: Set Debian firewall packages
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when: ansible_distribution_major_version is version('11', '>=')
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set_fact:
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debian_firewall_packages:
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- fail2ban
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- libnet-ip-perl # for aggregate-cidr-addresses.pl
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- nftables
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- python3-systemd
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- name: Install firewall packages
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apt: pkg={{ debian_firewall_packages }} state=present
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- name: Start and enable nftables
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when: ansible_distribution_major_version is version('11', '>=')
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systemd: name=nftables state=started enabled=yes
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- name: Copy nftables.conf
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when: ansible_distribution_major_version is version('11', '>=')
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template: src=nftables.conf.j2 dest=/etc/nftables.conf owner=root mode=0644
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notify:
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- reload nftables
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- name: Create /etc/nftables extra config directory
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when: ansible_distribution_major_version is version('11', '>=')
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file: path=/etc/nftables state=directory owner=root mode=0755
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- name: Copy extra nftables configuration files
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when: ansible_distribution_major_version is version('11', '>=')
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copy: src={{ item }} dest=/etc/nftables/{{ item }} owner=root group=root mode=0644
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loop:
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- spamhaus-ipv4.nft
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- spamhaus-ipv6.nft
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notify:
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- reload nftables
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- name: Use iptables backend in firewalld
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when: ansible_distribution_major_version is version('10', '==')
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lineinfile:
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dest: /etc/firewalld/firewalld.conf
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regexp: '^FirewallBackend=nftables$'
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line: 'FirewallBackend=iptables'
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notify:
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- restart firewalld
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# firewalld seems to have an issue with iptables 1.8.2 when using the nftables
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# backend. Using individual calls seems to work around it.
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# See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931722
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- name: Use individual iptables calls
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when: ansible_distribution_major_version is version('10', '==')
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lineinfile:
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dest: /etc/firewalld/firewalld.conf
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regexp: '^IndividualCalls=no$'
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line: 'IndividualCalls=yes'
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notify:
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- restart firewalld
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- name: Copy firewalld public zone file
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when: ansible_distribution_major_version is version('10', '<=')
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template: src=public.xml.j2 dest=/etc/firewalld/zones/public.xml owner=root mode=0600
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- name: Format public.xml firewalld zone file
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when: ansible_distribution_major_version is version('10', '<=')
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command: tidy -xml -iq -m -w 0 /etc/firewalld/zones/public.xml
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notify:
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- restart firewalld
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- name: Copy firewalld ipsets of abusive IPs
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when: ansible_distribution_major_version is version('10', '<=')
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copy: src={{ item }} dest=/etc/firewalld/ipsets/{{ item }} owner=root group=root mode=0600
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loop:
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- abusers-ipv4.xml
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- abusers-ipv6.xml
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- spamhaus-ipv4.xml
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- spamhaus-ipv6.xml
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notify:
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- restart firewalld
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- name: Copy Spamhaus firewalld update script
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when: ansible_distribution_version is version('10', '<=')
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copy: src=update-spamhaus-lists.sh dest=/usr/local/bin/update-spamhaus-lists.sh mode=0755 owner=root group=root
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- name: Copy Spamhaus firewalld systemd units
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when: ansible_distribution_version is version('10', '<=')
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copy: src={{ item }} dest=/etc/systemd/system/{{ item }} mode=0644 owner=root group=root
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loop:
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- update-spamhaus-lists.service
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- update-spamhaus-lists.timer
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register: spamhaus_firewalld_systemd_units
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- name: Copy Spamhaus nftables update scripts
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when: ansible_distribution_version is version('11', '>=')
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copy: src={{ item }} dest=/usr/local/bin/{{ item }} mode=0755 owner=root group=root
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loop:
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- update-spamhaus-nftables.sh
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- aggregate-cidr-addresses.pl
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- name: Copy Spamhaus nftables systemd units
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when: ansible_distribution_version is version('11', '>=')
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copy: src={{ item }} dest=/etc/systemd/system/{{ item }} mode=0644 owner=root group=root
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loop:
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- update-spamhaus-nftables.service
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- update-spamhaus-nftables.timer
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register: spamhaus_nftables_systemd_units
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# need to reload to pick up service/timer/environment changes
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- name: Reload systemd daemon
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systemd: daemon_reload=yes
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when: spamhaus_firewalld_systemd_units is changed or
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spamhaus_nftables_systemd_units is changed
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- name: Start and enable Spamhaus firewalld update timer
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when: ansible_distribution_version is version('10', '<=')
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systemd: name=update-spamhaus-lists.timer state=started enabled=yes
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notify:
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- restart firewalld
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- name: Start and enable Spamhaus nftables update timer
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when: ansible_distribution_version is version('11', '>=')
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systemd: name=update-spamhaus-nftables.timer state=started enabled=yes
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- include_tasks: fail2ban.yml
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when: ansible_distribution_major_version is version('9', '>=')
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tags: firewall
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# vim: set sw=2 ts=2:
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