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#!/usr/sbin/nft -f
{% import 'firewall/nftables-defines.j2' as group_tmpl %}
{% if helper_functions is vyos_defined('remove') %}
{# NAT if going to be disabled - remove rules and targets from nftables #}
{% set base_command = 'delete rule ip raw' %}
{{ base_command }} PREROUTING handle {{ pre_ct_ignore }}
{{ base_command }} OUTPUT handle {{ out_ct_ignore }}
{{ base_command }} PREROUTING handle {{ pre_ct_conntrack }}
{{ base_command }} OUTPUT handle {{ out_ct_conntrack }}
delete chain ip raw NAT_CONNTRACK
{% elif helper_functions is vyos_defined('add') %}
{# NAT if enabled - add targets to nftables #}
add chain ip raw NAT_CONNTRACK
add rule ip raw NAT_CONNTRACK counter accept
{% set base_command = 'add rule ip raw' %}
{{ base_command }} PREROUTING position {{ pre_ct_ignore }} counter jump VYOS_CT_HELPER
{{ base_command }} OUTPUT position {{ out_ct_ignore }} counter jump VYOS_CT_HELPER
{{ base_command }} PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK
{{ base_command }} OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK
{% endif %}
{% if first_install is not vyos_defined %}
delete table ip vyos_nat
{% endif %}
{% if deleted is not vyos_defined %}
table ip vyos_nat {
#
# Destination NAT rules build up here
#
chain PREROUTING {
type nat hook prerouting priority -100; policy accept;
counter jump VYOS_PRE_DNAT_HOOK
{% if destination.rule is vyos_defined %}
{% for rule, config in destination.rule.items() if config.disable is not vyos_defined %}
{{ config | nat_rule(rule, 'destination') }}
{% endfor %}
{% endif %}
}
#
# Source NAT rules build up here
#
chain POSTROUTING {
type nat hook postrouting priority 100; policy accept;
counter jump VYOS_PRE_SNAT_HOOK
{% if source.rule is vyos_defined %}
{% for rule, config in source.rule.items() if config.disable is not vyos_defined %}
{{ config | nat_rule(rule, 'source') }}
{% endfor %}
{% endif %}
}
chain VYOS_PRE_DNAT_HOOK {
return
}
chain VYOS_PRE_SNAT_HOOK {
return
}
{{ group_tmpl.groups(firewall_group, False) }}
}
{% endif %}
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