+{%
+ let flowtable_devices = fw4.resolve_offload_devices();
+ let available_helpers = filter(fw4.helpers(), h => h.available);
+-%}
+
table inet fw4
flush table inet fw4
+{% if (fw4.check_flowtable()): %}
+delete flowtable inet fw4 ft
+{% endif %}
table inet fw4 {
-{% if (fw4.default_option("flow_offloading") && length(devices) > 0): %}
+{% if (length(flowtable_devices) > 0): %}
#
# Flowtable
#
flowtable ft {
hook ingress priority 0;
- devices = {{ fw4.set(devices, true) }};
+ 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 %}
#
# Set definitions
{% endif %}
{% if (set.interval): %}
flags interval
+ auto-merge
{% endif %}
{% fw4.print_setentries(set) %}
}
{% 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")): %}
+{% 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")): %}
chain forward {
type filter hook forward priority filter; policy {{ fw4.forward_policy(true) }};
-{% if (fw4.default_option("flow_offloading") && length(devices) > 0): %}
+{% if (length(flowtable_devices) > 0): %}
meta l4proto { tcp, udp } flow offload @ft;
{% endif %}
ct state established,related accept comment "!fw4: Allow forwarded established and related flows"
{% 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): %}
+{% 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 %}
+{% endfor %}
+{% endfor %}
{% 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")
+ ? `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")
+ ? `icmpx type ${fw4.default_option("any_reject_code")}`
: "tcp reset"
}} comment "!fw4: Reject any other traffic"
}
-{% if (fw4.default_option("synflood_protect")):
+{% if (fw4.default_option("synflood_protect") && fw4.default_option("synflood_rate")):
let r = fw4.default_option("synflood_rate");
let b = fw4.default_option("synflood_burst");
%}
chain syn_flood {
- tcp flags & (fin | syn | rst | ack) == syn
- {%- if (r): %} limit rate {{ r.rate }}/{{ r.unit }}{% endif %}
+ limit rate {{ r.rate }}/{{ r.unit }}
{%- if (b): %} burst {{ b }} packets{% endif %} return comment "!fw4: Accept SYN packets below rate-limit"
drop comment "!fw4: Drop excess packets"
}
{% endif %}
{% for (let zone in fw4.zones()): %}
chain input_{{ zone.name }} {
-{% for (let rule in fw4.rules("input_"+zone.name)): %}
+{% for (let rule in fw4.rules(`input_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
{% if (zone.dflags.dnat): %}
}
chain output_{{ zone.name }} {
-{% for (let rule in fw4.rules("output_"+zone.name)): %}
+{% for (let rule in fw4.rules(`output_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
jump {{ zone.output }}_to_{{ zone.name }}
}
chain forward_{{ zone.name }} {
-{% for (let rule in fw4.rules("forward_"+zone.name)): %}
+{% for (let rule in fw4.rules(`forward_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
{% if (zone.dflags.dnat): %}
jump {{ zone.forward }}_to_{{ zone.name }}
}
+{% if (zone.dflags.helper): %}
+ chain helper_{{ zone.name }} {
+{% for (let rule in fw4.rules(`helper_${zone.name}`)): %}
+ {%+ include("rule.uc", { fw4, rule }) %}
+{% endfor %}
+ }
+
+{% endif %}
{% for (let verdict in ["accept", "reject", "drop"]): %}
{% if (zone.sflags[verdict]): %}
chain {{ verdict }}_from_{{ zone.name }} {
{% for (let zone in fw4.zones()): %}
{% if (zone.dflags.dnat): %}
chain dstnat_{{ zone.name }} {
-{% for (let redirect in fw4.redirects("dstnat_"+zone.name)): %}
+{% for (let redirect in fw4.redirects(`dstnat_${zone.name}`)): %}
{%+ include("redirect.uc", { fw4, redirect }) %}
-{% endfor %}
+{% endfor %}
}
{% endif %}
{% if (zone.dflags.snat): %}
chain srcnat_{{ zone.name }} {
-{% for (let redirect in fw4.redirects("srcnat_"+zone.name)): %}
+{% for (let redirect in fw4.redirects(`srcnat_${zone.name}`)): %}
{%+ include("redirect.uc", { fw4, redirect }) %}
-{% endfor %}
+{% endfor %}
{% if (zone.masq): %}
- meta nfproto ipv4 {%+ if (zone.masq4_src_pos): -%}
- ip saddr {{ fw4.set(zone.masq4_src_pos) }} {%+ endif -%}
- {%+ if (zone.masq4_src_neg): -%}
- ip saddr != {{ fw4.set(zone.masq4_src_neg) }} {%+ endif -%}
- {%+ if (zone.masq4_dest_pos): -%}
- ip daddr {{ fw4.set(zone.masq4_dest_pos) }} {%+ endif -%}
- {%+ if (zone.masq4_dest_neg): -%}
- ip daddr != {{ fw4.set(zone.masq4_dest_neg) }} {%+ endif -%}
- masquerade comment "!fw4: Masquerade IPv4 {{ zone.name }} traffic"
+{% 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): %}
- meta nfproto ipv6 {%+ if (zone.masq6_src_pos): -%}
- ip6 saddr {{ fw4.set(zone.masq6_src_pos) }} {%+ endif -%}
- {%+ if (zone.masq6_src_neg): -%}
- ip6 saddr != {{ fw4.set(zone.masq6_src_neg) }} {%+ endif -%}
- {%+ if (zone.masq6_dest_pos): -%}
- ip6 daddr {{ fw4.set(zone.masq6_dest_pos) }} {%+ endif -%}
- {%+ if (zone.masq6_dest_neg): -%}
- ip6 daddr != {{ fw4.set(zone.masq6_dest_neg) }} {%+ endif -%}
- masquerade comment "!fw4: Masquerade IPv6 {{ zone.name }} traffic"
+{% 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 %}
}
{% endfor %}
#
- # Raw rules (notrack & helper)
+ # Raw rules (notrack)
#
chain raw_prerouting {
type filter hook prerouting priority raw; policy accept;
-{% for (let target in ["helper", "notrack"]): %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags[target]): %}
-{% for (let rule in zone.match_rules): %}
-{% let devs = fw4.filter_loopback_devs(rule.devices_pos, false); %}
-{% let nets = fw4.filter_loopback_addrs(rule.subnets_pos, false); %}
-{% if (rule.devices_neg || rule.subnets_neg || length(devs) || length(nets)): %}
- {%+ if (rule.family): -%}
- meta nfproto {{ fw4.nfproto(rule.family) }} {%+ endif -%}
- {%+ if (length(devs)): -%}
- iifname {{ fw4.set(devs) }} {%+ endif -%}
- {%+ if (rule.devices_neg): -%}
- iifname != {{ fw4.set(rule.devices_neg) }} {%+ endif -%}
- {%+ if (length(nets)): -%}
- {{ fw4.ipproto(rule.family) }} saddr {{ fw4.set(nets) }} {%+ endif -%}
- {%+ if (rule.subnets_neg): -%}
- {{ fw4.ipproto(rule.family) }} saddr != {{ fw4.set(rule.subnets_neg) }} {%+ endif -%}
- jump {{ target }}_{{ zone.name }} comment "!fw4: {{ zone.name }} {{ fw4.nfproto(rule.family, true) }} {{
- (target == "helper") ? "CT helper assignment" : "CT bypass"
- }}"
-{% endif %}
-{% endfor %}
-{% endif %}
-{% endfor %}
+{% 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 %}
}
chain raw_output {
type filter hook output priority raw; policy accept;
-{% for (let target in ["helper", "notrack"]): %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags[target]): %}
-{% for (let rule in zone.match_rules): %}
-{% let devs = fw4.filter_loopback_devs(rule.devices_pos, true); %}
-{% let nets = fw4.filter_loopback_addrs(rule.subnets_pos, true); %}
-{% if (length(devs) || length(nets)): %}
- {%+ if (rule.family): -%}
- meta nfproto {{ fw4.nfproto(rule.family) }} {%+ endif -%}
- {%+ if (length(devs)): -%}
- iifname {{ fw4.set(devs) }} {%+ endif -%}
- {%+ if (length(nets)): -%}
- {{ fw4.ipproto(rule.family) }} saddr {{ fw4.set(nets) }} {%+ endif -%}
- jump {{ target }}_{{ zone.name }} comment "!fw4: {{ zone.name }} {{ fw4.nfproto(rule.family, true) }} {{
- (target == "helper") ? "CT helper assignment" : "CT bypass"
- }}"
-{% endif %}
-{% endfor %}
-{% endif %}
-{% endfor %}
-{% endfor %}
- }
-
-{% for (let helper in fw4.helpers()): %}
-{% if (helper.available): %}
-{% for (let proto in helper.proto): %}
- ct helper {{ helper.name }} {
- type {{ fw4.quote(helper.name, true) }} protocol {{ proto.name }};
- }
-
+{% 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 %}
-{% for (let target in ["helper", "notrack"]): %}
-{% for (let zone in fw4.zones()): %}
-{% if (zone.dflags[target]): %}
- chain {{ target }}_{{ zone.name }} {
-{% for (let rule in fw4.rules(target+"_"+zone.name)): %}
+ }
+
+{% 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 %}
{% endfor %}
#
}
chain mangle_output {
- type filter hook output priority mangle; policy accept;
+ type route hook output priority mangle; policy accept;
{% for (let rule in fw4.rules("mangle_output")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
projects / project / firewall4.git / blobdiff