+++ /dev/null
-{%
- let flowtable_devices = fw4.resolve_offload_devices();
- let available_helpers = filter(fw4.helpers(), h => h.available);
- let defined_ipsets = fw4.ipsets();
--%}
-
-table inet fw4
-flush table inet fw4
-{% if (fw4.check_flowtable()): %}
-delete flowtable inet fw4 ft
-{% endif %}
-{% fw4.includes('ruleset-prepend') %}
-
-table inet fw4 {
-{% if (length(flowtable_devices) > 0): %}
- #
- # Flowtable
- #
-
- flowtable ft {
- hook ingress priority 0;
- devices = {{ fw4.set(flowtable_devices, true) }};
-{% if (fw4.default_option("flow_offloading_hw")): %}
- flags offload;
-{% endif %}
- }
-
-
-{% endif %}
-{% if (length(available_helpers)): %}
- #
- # CT helper definitions
- #
-
-{% for (let helper in available_helpers): %}
-{% for (let proto in helper.proto): %}
- ct helper {{ helper.name }} {
- type {{ fw4.quote(helper.name, true) }} protocol {{ proto.name }};
- }
-
-{% endfor %}
-{% endfor %}
-
-{% endif %}
-{% if (length(defined_ipsets)): %}
- #
- # Set definitions
- #
-
-{% for (let set in defined_ipsets): %}
- set {{ set.name }} {
- type {{ fw4.concat(set.types) }}
-{% if (set.maxelem > 0): %}
- size {{ set.maxelem }}
-{% endif %}
-{% if (set.timeout > 0): %}
- timeout {{ set.timeout }}s
-{% endif %}
-{% if (set.interval): %}
- auto-merge
-{% endif %}
-{% if (set.flags): %}
- flags {{ join(',', set.flags) }}
-{% endif %}
-{% fw4.print_setentries(set) %}
- }
-
-{% endfor %}
-
-{% endif %}
- #
- # Defines
- #
-
-{% for (let zone in fw4.zones()): %}
- define {{ replace(zone.name, /^[0-9]/, '_$&') }}_devices = {{ fw4.set(zone.match_devices, true) }}
- define {{ replace(zone.name, /^[0-9]/, '_$&') }}_subnets = {{ fw4.set(zone.match_subnets, true) }}
-
-{% endfor %}
-
- #
- # User includes
- #
-
- include "/etc/nftables.d/*.nft"
-{% fw4.includes('table-prepend') %}
-
-
- #
- # Filter rules
- #
-
- chain input {
- type filter hook input priority filter; policy {{ fw4.input_policy(true) }};
-
- iifname "lo" accept comment "!fw4: Accept traffic from loopback"
-
-{% fw4.includes('chain-prepend', 'input') %}
- ct state established,related accept comment "!fw4: Allow inbound established and related flows"
-{% if (fw4.default_option("drop_invalid")): %}
- ct state invalid drop comment "!fw4: Drop flows with invalid conntrack state"
-{% endif %}
-{% if (fw4.default_option("synflood_protect") && fw4.default_option("synflood_rate")): %}
- tcp flags & (fin | syn | rst | ack) == syn jump syn_flood comment "!fw4: Rate limit TCP syn packets"
-{% endif %}
-{% for (let rule in fw4.rules("input")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% for (let zone in fw4.zones()): for (let rule in zone.match_rules): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "input" }) %}
-{% endfor; endfor %}
-{% if (fw4.input_policy() == "reject"): %}
- jump handle_reject
-{% endif %}
-{% fw4.includes('chain-append', 'input') %}
- }
-
- chain forward {
- type filter hook forward priority filter; policy {{ fw4.forward_policy(true) }};
-
-{% if (length(flowtable_devices) > 0): %}
- meta l4proto { tcp, udp } flow offload @ft;
-{% endif %}
-{% fw4.includes('chain-prepend', 'forward') %}
- ct state established,related accept comment "!fw4: Allow forwarded established and related flows"
-{% if (fw4.default_option("drop_invalid")): %}
- ct state invalid drop comment "!fw4: Drop flows with invalid conntrack state"
-{% endif %}
-{% for (let rule in fw4.rules("forward")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% for (let zone in fw4.zones()): for (let rule in zone.match_rules): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "forward" }) %}
-{% endfor; endfor %}
-{% fw4.includes('chain-append', 'forward') %}
-{% if (fw4.forward_policy() == "reject"): %}
- jump handle_reject
-{% endif %}
- }
-
- chain output {
- type filter hook output priority filter; policy {{ fw4.output_policy(true) }};
-
- oifname "lo" accept comment "!fw4: Accept traffic towards loopback"
-
-{% fw4.includes('chain-prepend', 'output') %}
- ct state established,related accept comment "!fw4: Allow outbound established and related flows"
-{% if (fw4.default_option("drop_invalid")): %}
- ct state invalid drop comment "!fw4: Drop flows with invalid conntrack state"
-{% endif %}
-{% for (let rule in fw4.rules("output")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% for (let zone in fw4.zones()): %}
-{% for (let rule in zone.match_rules): %}
-{% if (zone.dflags.helper): %}
-{% let devices_pos = fw4.filter_loopback_devs(rule.devices_pos, true); %}
-{% let subnets_pos = fw4.filter_loopback_addrs(rule.subnets_pos, true); %}
-{% if (devices_pos || subnets_pos): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule: { ...rule, devices_pos, subnets_pos }, direction: "helper" }) %}
-{% endif %}
-{% endif %}
- {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "output" }) %}
-{% endfor %}
-{% endfor %}
-{% fw4.includes('chain-append', 'output') %}
-{% if (fw4.output_policy() == "reject"): %}
- jump handle_reject
-{% endif %}
- }
-
- chain prerouting {
- type filter hook prerouting priority filter; policy accept;
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags.helper): %}
-{% for (let rule in zone.match_rules): %}
-{% let devices_pos = fw4.filter_loopback_devs(rule.devices_pos, false); %}
-{% let subnets_pos = fw4.filter_loopback_addrs(rule.subnets_pos, false); %}
-{% if (rule.devices_neg || rule.subnets_neg || devices_pos || subnets_pos): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule: { ...rule, devices_pos, subnets_pos }, direction: "helper" }) %}
-{% endif %}
-{% endfor %}
-{% endif %}
-{% endfor %}
- }
-
- chain handle_reject {
- meta l4proto tcp reject with {{
- (fw4.default_option("tcp_reject_code") != "tcp-reset")
- ? `icmpx type ${fw4.default_option("tcp_reject_code")}`
- : "tcp reset"
- }} comment "!fw4: Reject TCP traffic"
- reject with {{
- (fw4.default_option("any_reject_code") != "tcp-reset")
- ? `icmpx type ${fw4.default_option("any_reject_code")}`
- : "tcp reset"
- }} comment "!fw4: Reject any other traffic"
- }
-
-{% if (fw4.default_option("synflood_protect") && fw4.default_option("synflood_rate")):
- let r = fw4.default_option("synflood_rate");
- let b = fw4.default_option("synflood_burst");
-%}
- chain syn_flood {
- limit rate {{ r.rate }}/{{ r.unit }}
- {%- if (b): %} burst {{ b }} packets{% endif %} return comment "!fw4: Accept SYN packets below rate-limit"
- drop comment "!fw4: Drop excess packets"
- }
-
-{% endif %}
-{% for (let zone in fw4.zones()): %}
- chain input_{{ zone.name }} {
-{% fw4.includes('chain-prepend', `input_${zone.name}`) %}
-{% for (let rule in fw4.rules(`input_${zone.name}`)): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% if (zone.dflags.dnat): %}
- ct status dnat accept comment "!fw4: Accept port redirections"
-{% endif %}
-{% fw4.includes('chain-append', `input_${zone.name}`) %}
- jump {{ zone.input }}_from_{{ zone.name }}
- }
-
- chain output_{{ zone.name }} {
-{% fw4.includes('chain-prepend', `output_${zone.name}`) %}
-{% for (let rule in fw4.rules(`output_${zone.name}`)): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% fw4.includes('chain-append', `output_${zone.name}`) %}
- jump {{ zone.output }}_to_{{ zone.name }}
- }
-
- chain forward_{{ zone.name }} {
-{% fw4.includes('chain-prepend', `forward_${zone.name}`) %}
-{% for (let rule in fw4.rules(`forward_${zone.name}`)): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% if (zone.dflags.dnat): %}
- ct status dnat accept comment "!fw4: Accept port forwards"
-{% endif %}
-{% fw4.includes('chain-append', `forward_${zone.name}`) %}
- jump {{ zone.forward }}_to_{{ zone.name }}
- }
-
-{% if (zone.dflags.helper): %}
- chain helper_{{ zone.name }} {
-{% for (let rule in fw4.rules(`helper_${zone.name}`)): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
- }
-
-{% endif %}
-{% for (let verdict in ["accept", "reject", "drop"]): %}
-{% if (zone.sflags[verdict]): %}
- chain {{ verdict }}_from_{{ zone.name }} {
-{% for (let rule in zone.match_rules): %}
- {%+ include("zone-verdict.uc", { fw4, zone, rule, egress: false, verdict }) %}
-{% endfor %}
- }
-
-{% endif %}
-{% if (zone.dflags[verdict]): %}
- chain {{ verdict }}_to_{{ zone.name }} {
-{% for (let rule in zone.match_rules): %}
- {%+ include("zone-verdict.uc", { fw4, zone, rule, egress: true, verdict }) %}
-{% endfor %}
- }
-
-{% endif %}
-{% endfor %}
-{% endfor %}
-
- #
- # NAT rules
- #
-
- chain dstnat {
- type nat hook prerouting priority dstnat; policy accept;
-{% fw4.includes('chain-prepend', 'dstnat') %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags.dnat): %}
-{% for (let rule in zone.match_rules): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "dstnat" }) %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% fw4.includes('chain-append', 'dstnat') %}
- }
-
- chain srcnat {
- type nat hook postrouting priority srcnat; policy accept;
-{% fw4.includes('chain-prepend', 'srcnat') %}
-{% for (let redirect in fw4.redirects("srcnat")): %}
- {%+ include("redirect.uc", { fw4, redirect }) %}
-{% endfor %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags.snat): %}
-{% for (let rule in zone.match_rules): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "srcnat" }) %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% fw4.includes('chain-append', 'srcnat') %}
- }
-
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags.dnat): %}
- chain dstnat_{{ zone.name }} {
-{% fw4.includes('chain-prepend', `dstnat_${zone.name}`) %}
-{% for (let redirect in fw4.redirects(`dstnat_${zone.name}`)): %}
- {%+ include("redirect.uc", { fw4, redirect }) %}
-{% endfor %}
-{% fw4.includes('chain-append', `dstnat_${zone.name}`) %}
- }
-
-{% endif %}
-{% if (zone.dflags.snat): %}
- chain srcnat_{{ zone.name }} {
-{% fw4.includes('chain-prepend', `srcnat_${zone.name}`) %}
-{% for (let redirect in fw4.redirects(`srcnat_${zone.name}`)): %}
- {%+ include("redirect.uc", { fw4, redirect }) %}
-{% endfor %}
-{% if (zone.masq): %}
-{% for (let saddrs in zone.masq4_src_subnets): %}
-{% for (let daddrs in zone.masq4_dest_subnets): %}
- {%+ include("zone-masq.uc", { fw4, zone, family: 4, saddrs, daddrs }) %}
-{% endfor %}
-{% endfor %}
-{% endif %}
-{% if (zone.masq6): %}
-{% for (let saddrs in zone.masq6_src_subnets): %}
-{% for (let daddrs in zone.masq6_dest_subnets): %}
- {%+ include("zone-masq.uc", { fw4, zone, family: 6, saddrs, daddrs }) %}
-{% endfor %}
-{% endfor %}
-{% endif %}
-{% fw4.includes('chain-append', `srcnat_${zone.name}`) %}
- }
-
-{% endif %}
-{% endfor %}
-
- #
- # Raw rules (notrack)
- #
-
- chain raw_prerouting {
- type filter hook prerouting priority raw; policy accept;
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags["notrack"]): %}
-{% for (let rule in zone.match_rules): %}
-{% let devices_pos = fw4.filter_loopback_devs(rule.devices_pos, false); %}
-{% let subnets_pos = fw4.filter_loopback_addrs(rule.subnets_pos, false); %}
-{% if (rule.devices_neg || rule.subnets_neg || devices_pos || subnets_pos): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule: { ...rule, devices_pos, subnets_pos }, direction: "notrack" }) %}
-{% endif %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% fw4.includes('chain-append', 'raw_prerouting') %}
- }
-
- chain raw_output {
- type filter hook output priority raw; policy accept;
-{% fw4.includes('chain-prepend', 'raw_output') %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags["notrack"]): %}
-{% for (let rule in zone.match_rules): %}
-{% let devices_pos = fw4.filter_loopback_devs(rule.devices_pos, true); %}
-{% let subnets_pos = fw4.filter_loopback_addrs(rule.subnets_pos, true); %}
-{% if (devices_pos || subnets_pos): %}
- {%+ include("zone-jump.uc", { fw4, zone, rule: { ...rule, devices_pos, subnets_pos }, direction: "notrack" }) %}
-{% endif %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% fw4.includes('chain-append', 'raw_output') %}
- }
-
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags.notrack): %}
- chain notrack_{{ zone.name }} {
-{% for (let rule in fw4.rules(`notrack_${zone.name}`)): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
- }
-
-{% endif %}
-{% endfor %}
-
- #
- # Mangle rules
- #
-
- chain mangle_prerouting {
- type filter hook prerouting priority mangle; policy accept;
-{% fw4.includes('chain-prepend', 'mangle_prerouting') %}
-{% for (let rule in fw4.rules("mangle_prerouting")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% fw4.includes('chain-append', 'mangle_prerouting') %}
- }
-
- chain mangle_postrouting {
- type filter hook postrouting priority mangle; policy accept;
-{% fw4.includes('chain-prepend', 'mangle_postrouting') %}
-{% for (let rule in fw4.rules("mangle_postrouting")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% fw4.includes('chain-append', 'mangle_postrouting') %}
- }
-
- chain mangle_input {
- type filter hook input priority mangle; policy accept;
-{% fw4.includes('chain-prepend', 'mangle_input') %}
-{% for (let rule in fw4.rules("mangle_input")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% fw4.includes('chain-append', 'mangle_input') %}
- }
-
- chain mangle_output {
- type route hook output priority mangle; policy accept;
-{% fw4.includes('chain-prepend', 'mangle_output') %}
-{% for (let rule in fw4.rules("mangle_output")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% fw4.includes('chain-append', 'mangle_output') %}
- }
-
- chain mangle_forward {
- type filter hook forward priority mangle; policy accept;
-{% fw4.includes('chain-prepend', 'mangle_forward') %}
-{% for (let rule in fw4.rules("mangle_forward")): %}
- {%+ include("rule.uc", { fw4, rule }) %}
-{% endfor %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.mtu_fix): %}
-{% for (let rule in zone.match_rules): %}
- {%+ include("zone-mssfix.uc", { fw4, zone, rule, egress: false }) %}
- {%+ include("zone-mssfix.uc", { fw4, zone, rule, egress: true }) %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% fw4.includes('chain-append', 'mangle_forward') %}
- }
-{% fw4.includes('table-append') %}
-}
-{% fw4.includes('ruleset-append') %}
projects / project / firewall4.git / commitdiff