ansible.nftables/defaults/main.yml

---
# .. vim: foldmarker=[[[,]]]:foldmethod=marker
#
# ipr-cnrs.nftables default variables
# ===================================

# Packages and installation [[[
# -----------------------------

# .. envvar:: nft_enabled [[[
#
# Enable or disable support for Nftables on a given host. Disabling this
# option does not remove existing installation and configuration.
#
nft_enabled: true
                                                                   # ]]]
# .. envvar:: nft_pkg_state [[[
#
# What is the desired state for Nftables packages ? Possible options :
#
# ``present``
#   Default. Nftables packages will be installed.
#
# ``absent``
#   Ensure to remove Nftables related packages.
nft_pkg_state: 'present'
                                                                   # ]]]
# .. envvar:: nft_old_pkg_list [[[
#
# List of old Iptables packages to remove to avoid duplicate firewall.
#
nft_old_pkg_list:
  - 'iptables'
  - 'libiptc0'
                                                                   # ]]]
# .. envvar:: nft_old_pkg_state [[[
#
# What is the desired state for Iptables packages ? Possible options :
#
# ``absent``
#   Default. Ensure to remove Iptables related packages.
#
# ``present``
#   Iptables packages will be kept.
nft_old_pkg_state: 'absent'
                                                                   # ]]]
# .. envvar:: nft_old_pkg_manage [[[
#
# If the old Iptables packages should be managed ? Possible options :
#
# ``true``
#   Default. Ensure to apply the required state for Iptables related packages.
#
# ``false``
#   Iptables packages will not be touched.
nft_old_pkg_manage: true
                                                                   # ]]]
                                                                   # ]]]
# Nftables global rules [[[
# -------------------------

# .. envvar:: nft_global_default_rules [[[
#
# List of global rules (applied on all tables) to configure for all hosts
# inherited from this role.
nft_global_default_rules:
  005 state management:
    - ct state established,related accept
    - ct state invalid drop
                                                                   # ]]]
# .. envvar:: nft_global_rules [[[
#
# List of global rules (applied on all tables) to configure for all hosts
# in the Ansible inventory.
nft_global_rules: {}
                                                                   # ]]]
# .. envvar:: nft_merged_groups [[[
#
# Enable or disable the ability to merge multiple firewall group variables
nft_merged_groups: false
                                                                   # ]]]
# .. envvar:: nft_merged_groups_dir [[[
#
# The directory to read the group firewall rules from.
# Relative to the playbook directory.
nft_merged_groups_dir: vars/
                                                                   # ]]]
# .. envvar:: nft_global_group_rules [[[
#
# List of global rules (applied on all tables) to configure for hosts in
# specific Ansible inventory group.
nft_global_group_rules: {}
                                                                   # ]]]
# .. envvar:: nft_global_host_rules [[[
#
# List of global rules (applied on all tables) to configure for specific hosts
# in the Ansible inventory.
nft_global_host_rules: {}
                                                                   # ]]]
# .. envvar:: nft__custom_content [[[
#
# Custom content (tables, include,…) to add in Nftables configuration.
nft__custom_content: ''
                                                                   # ]]]
# .. envvar:: nft_custom_includes [[[
#
# Custom includes to add into the main Nftables filter configuration.
nft_custom_includes: ''
                                                                   # ]]]
# .. envvar:: nft_conf_dir_path [[[
#
# Path to the sub directory for Nftables configuration files.
#
# Should be an absolut path and this var will be used in all *_path vars.
nft_conf_dir_path: '/etc/nftables.d'
                                                                   # ]]]
# .. envvar:: nft_main_conf_path [[[
#
# Path to the main configuration file called by the Systemd Nftables service.
#
# Should be an absolut path.
nft_main_conf_path: '/etc/nftables.conf'
                                                                   # ]]]
# .. envvar:: nft_main_conf_content [[[
#
# Template used to provide the previous main configuration file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft_main_conf_content: 'etc/nftables.conf.j2'
                                                                   # ]]]
                                                                   # ]]]
# Nftables vars definition [[[
# ----------------------------
#
# These lists allow to define some vars that can be used in nftables rules.
# See the official Nftables wiki page for more informations and examples :
# https://wiki.nftables.org/wiki-nftables/index.php/Scripting#Defining_variables

# .. envvar:: nft_define_default [[[
#
# List of vars definition to configure for all hosts inherited from this role.
nft_define_default:
  broadcast and multicast:
    desc: 'broadcast and multicast'
    name: badcast_addr
    value: '{ 255.255.255.255, 224.0.0.1, 224.0.0.251 }'
  ip6 broadcast and multicast:
    desc: 'broadcast and multicast'
    name: ip6_badcast_addr
    value: '{ ff02::16 }'
  input tcp accepted:
    name: in_tcp_accept
    value: '{ ssh }'
  input udp accepted:
    name: in_udp_accept
    value: 'none'
  output tcp accepted:
    name: out_tcp_accept
    value: '{ http, https, hkp }'
  output udp accepted:
    name: out_udp_accept
    value: '{ bootps, domain, ntp }'
                                                                   # ]]]
# .. envvar:: nft_define [[[
#
# List of vars definition to configure for all hosts in the Ansible inventory.
nft_define: {}
                                                                   # ]]]
# .. envvar:: nft_define_group [[[
#
# List of vars definition to configure for hosts in specific
# Ansible inventory group.
nft_define_group: {}
                                                                   # ]]]
# .. envvar:: nft_define_host [[[
#
# List of vars definition to configure for specific hosts
# in the Ansible inventory.
nft_define_host: {}
                                                                   # ]]]
# .. envvar:: nft_define_conf_path [[[
#
# Path to the defined vars file to include in the main configuration file
# in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft_define_conf_path: '{{ nft_conf_dir_path }}/defines.nft'
                                                                   # ]]]
# .. envvar:: nft_define_conf_content [[[
#
# Template used to provide the previous defined vars file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft_define_conf_content: 'etc/nftables.d/defines.nft.j2'
                                                                   # ]]]
                                                                   # ]]]
# Nftables sets definition [[[
# ----------------------------
#
# These "set" lists allow to define sets that can be used in Nftables rules.
# See the official Nftables wiki page for more informations and examples :
# https://wiki.nftables.org/wiki-nftables/index.php/Sets

# .. envvar:: nft_define_default [[[
#
# List of sets to configure for all hosts inherited from this role.
nft_set_default:
  blackhole:
    - type ipv4_addr;
    - elements = $badcast_addr
  ip6blackhole:
    - type ipv6_addr;
    - elements = $ip6_badcast_addr
  in_tcp_accept:
    - type inet_service; flags interval;
    - elements = $in_tcp_accept
  in_udp_accept:
    - type inet_service; flags interval;
  out_tcp_accept:
    - type inet_service; flags interval;
    - elements = $out_tcp_accept
  out_udp_accept:
    - type inet_service; flags interval;
    - elements = $out_udp_accept
                                                                   # ]]]
# .. envvar:: nft_set [[[
#
# List of sets to configure for all hosts in the Ansible inventory.
nft_set: {}
                                                                   # ]]]
# .. envvar:: nft_set_group [[[
#
# List of sets to configure for hosts in specific Ansible inventory group.
nft_set_group: {}
                                                                   # ]]]
# .. envvar:: nft_set_host [[[
#
# List of sets to configure for specific hosts in the Ansible inventory.
nft_set_host: {}
                                                                   # ]]]
# .. envvar:: nft_set_conf_path [[[
#
# Path to the "sets" file to include in the main configuration file
# in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft_set_conf_path: '{{ nft_conf_dir_path }}/sets.nft'
                                                                   # ]]]
# .. envvar:: nft_set_conf_content [[[
#
# Template used to provide the previous "sets" file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft_set_conf_content: 'etc/nftables.d/sets.nft.j2'
                                                                   # ]]]
                                                                   # ]]]
# inet filter table rules [[[
# ---------------------------
#
# All these rules will be set up in an inet table in order to filter the
# input and output traffic.

# .. envvar:: nft_input_default_rules [[[
#
# List of input rules to configure for all hosts inherited from this role.
nft_input_default_rules:
  000 policy:
    - type filter hook input priority 0; policy drop;
  005 global:
    - jump global
  010 drop unwanted:
    - ip daddr @blackhole counter drop
  011 drop unwanted ipv6:
    - ip6 daddr @ip6blackhole counter drop
  015 localhost:
    - iif lo accept
  050 icmp:
    - meta l4proto {icmp,icmpv6} accept
  200 input udp accepted:
    - udp dport @in_udp_accept ct state new accept
  210 input tcp accepted:
    - tcp dport @in_tcp_accept ct state new accept
                                                                   # ]]]
# .. envvar:: nft_input_rules [[[
#
# List of input rules to configure for all hosts in the Ansible inventory.
nft_input_rules: {}
                                                                   # ]]]
# .. envvar:: nft_input_group_rules [[[
#
# List of input rules to configure for hosts in specific Ansible inventory group.
nft_input_group_rules: {}
                                                                   # ]]]
# .. envvar:: nft_input_host_rules [[[
#
# List of input rules to configure for specific hosts in the Ansible inventory.
nft_input_host_rules: {}
                                                                   # ]]]
# .. envvar:: nft_input_conf_path [[[
#
# Path to the input rules file for the filter table to include in the main
# configuration file in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft_input_conf_path: '{{ nft_conf_dir_path }}/filter-input.nft'
                                                                   # ]]]
# .. envvar:: nft_input_conf_content [[[
#
# Template used to provide the previous input rules file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft_input_conf_content: 'etc/nftables.d/filter-input.nft.j2'
                                                                   # ]]]

# .. envvar:: nft_output_default_rules [[[
#
# List of output rules to configure for all hosts inherited from this role.
nft_output_default_rules:
  000 policy:
    - type filter hook output priority 0; policy drop;
  005 global:
    - jump global
  015 localhost:
    - oif lo accept
  050 icmp:
    - ip protocol icmp accept
    - ip6 nexthdr icmpv6 counter accept
  200 output udp accepted:
    - udp dport @out_udp_accept ct state new accept
  210 output tcp accepted:
    - tcp dport @out_tcp_accept ct state new accept
  250 reset-ssh:  # allow the host to reset SSH connections to avoid 10 min delay from Ansible controller
    - tcp sport ssh tcp flags { rst, psh | ack } counter accept
                                                                   # ]]]
# .. envvar:: nft_output_rules [[[
#
# List of output rules to configure for all hosts in the Ansible inventory.
nft_output_rules: {}
                                                                   # ]]]
# .. envvar:: nft_output_group_rules [[[
#
# List of output rules to configure for hosts in specific Ansible inventory group.
nft_output_group_rules: {}
                                                                   # ]]]
# .. envvar:: nft_output_host_rules [[[
#
# List of output rules to configure for specific hosts in the Ansible inventory.
nft_output_host_rules: {}
                                                                   # ]]]
# .. envvar:: nft_output_conf_path [[[
#
# Path to the output rules file for the filter table to include in the main
# configuration file in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft_output_conf_path: '{{ nft_conf_dir_path }}/filter-output.nft'
                                                                   # ]]]
# .. envvar:: nft_output_conf_content [[[
#
# Template used to provide the previous output rules file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft_output_conf_content: 'etc/nftables.d/filter-output.nft.j2'
                                                                   # ]]]
                                                                   # ]]]
# ip nat table rules [[[
# ---------------------------
#
# All these rules will be set up in an ip table in order to perform some
# Network Address Translation (NAT).

# .. envvar:: nft__nat_table_manage [[[
#
# If the nat table should be managed ? Possible options are :
#
# ``False``
#   Default. The nat table is not managed and rules will not be added.
#
# ``True``
#   Add the pre and postrouting rules that follow.
nft__nat_table_manage: False
                                                                   # ]]]
# .. envvar:: nft__nat_default_prerouting_rules [[[
#
# List of prerouting rules to configure for all hosts inherited from this role.
nft__nat_default_prerouting_rules:
  000 policy:
    - type nat hook prerouting priority 0;
                                                                   # ]]]
# .. envvar:: nft__nat_prerouting_rules [[[
#
# List of prerouting rules to configure for all hosts in the Ansible inventory.
nft__nat_prerouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_group_prerouting_rules [[[
#
# List of prerouting rules to configure for hosts in specific
# Ansible inventory group.
nft__nat_group_prerouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_host_prerouting_rules [[[
#
# List of prerouting rules to configure for specific hosts
# in the Ansible inventory.
nft__nat_host_prerouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_prerouting_conf_path [[[
#
# Path to the prerouting rules file for the nat table to include in the main
# configuration file in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft__nat_prerouting_conf_path: '{{ nft_conf_dir_path }}/nat-prerouting.nft'
                                                                   # ]]]
# .. envvar:: nft__nat_prerouting_conf_content [[[
#
# Template used to provide the previous prerouting rules file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft__nat_prerouting_conf_content: 'etc/nftables.d/nat-prerouting.nft.j2'
                                                                   # ]]]

# .. envvar:: nft__nat_default_postrouting_rules [[[
#
# List of postrouting rules to configure for all hosts inherited from this role.
nft__nat_default_postrouting_rules:
  000 policy:
    - type nat hook postrouting priority 100;
                                                                   # ]]]
# .. envvar:: nft__nat_postrouting_rules [[[
#
# List of postrouting rules to configure for all hosts in the Ansible inventory.
nft__nat_postrouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_group_postrouting_rules [[[
#
# List of postrouting rules to configure for hosts in specific
# Ansible inventory group.
nft__nat_group_postrouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_host_postrouting_rules [[[
#
# List of postrouting rules to configure for specific hosts
# in the Ansible inventory.
nft__nat_host_postrouting_rules: {}
                                                                   # ]]]
# .. envvar:: nft__nat_postrouting_conf_path [[[
#
# Path to the postrouting rules file for the nat table to include in the main
# configuration file in order to use the previous defined lists.
#
# Should include the '{{ nft_conf_dir_path }}' var or be an absolut path.
nft__nat_postrouting_conf_path: '{{ nft_conf_dir_path }}/nat-postrouting.nft'
                                                                   # ]]]
# .. envvar:: nft__nat_postrouting_conf_content [[[
#
# Template used to provide the previous postrouting rules file.
#
# Must be a relative path from default/ directory of this role or from your
# Ansible inventory directory.
nft__nat_postrouting_conf_content: 'etc/nftables.d/nat-postrouting.nft.j2'
                                                                   # ]]]
                                                                   # ]]]
# Service management [[[
# ----------------------

# .. envvar:: nft_service_manage [[[
#
# If the Nftables service should be managed ? Possible options are :
#
# ``True``
#   Default. The service is started.
#
# ``False``
#   The service will not be touched.
nft_service_manage: true
                                                                   # ]]]
# .. envvar:: nft_service_name [[[
#
# The service name to manage.
nft_service_name: 'nftables'
                                                                   # ]]]
# .. envvar:: nft_service_enabled [[[
#
# If the Nftables service should be enabled at startup ? Possible options are :
#
# ``True``
#   Default. The service is enabled.
#
# ``False``
#   The service is disabled from startup.
nft_service_enabled: true
                                                                   # ]]]
# .. envvar:: nft_service_unit_path [[[
#
# Path to store Nftables service.
nft_service_unit_path: '/lib/systemd/system/nftables.service'
                                                                   # ]]]
# .. envvar:: nft_service_unit_content [[[
#
# Template used to provide systemd unit for Nftables service.
nft_service_unit_content: 'lib/systemd/system/nftables.service.j2'
                                                                   # ]]]
# .. envvar:: nft__service_protect [[[
#
# If the systemd unit should have the Protect directives ? Possible options :
#
# ``True``
#   Default. Directives will be set (ProtectSystem, ProtectHome,…).
#
# ``False``
#   The directives will be ignored.
nft__service_protect: true
                                                                   # ]]]
# .. envvar:: nft__fail2ban_service [[[
#
# If the Nftables systemd unit should also restart Fail2ban service. Possible
# options are :
#
# ``False``
#   Default. Nftables service will not affect Fail2ban service.
#
# ``True``
#   Any Nftables service (re)start will also restart Fail2ban service.
nft__fail2ban_service: False
                                                                   # ]]]
# .. envvar:: nft_debug [[[
#
# Toggle on/off more verbose output. Possible options are:
#
# ''Flase''
# Default. No additional output will be given.
#
# ''True''
# More verbose output.
nft_debug: False

                                                                   # ]]]
                                                                   # ]]]