+{% let flowtable_devices = fw4.resolve_offload_devices(); -%}
+
table inet fw4
flush table inet fw4
+{% if (fw4.check_flowtable()): %}
+delete flowtable inet fw4 ft
+{% endif %}
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 %}
#
# Set definitions
#
{% if (set.maxelem > 0): %}
size {{ set.maxelem }}
{% endif %}
+{% if (set.timeout >= 0): %}
+ timeout {{ set.timeout }}s
+{% endif %}
{% if (set.interval): %}
flags interval
+ auto-merge
{% endif %}
{% fw4.print_setentries(set) %}
}
{% if (length(zone.match_subnets)): %}
define {{ zone.name }}_subnets = {{ fw4.set(zone.match_subnets, true) }}
{% endif %}
-
{% endfor %}
#
iifname "lo" accept comment "!fw4: Accept traffic from loopback"
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")): %}
+{% 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 (local rule in fw4.rules("input")): %}
+{% for (let rule in fw4.rules("input")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
-
-{% for (local zone in fw4.zones()): for (local rule in zone.match_rules): %}
- {%+ include("zone-match.uc", { fw4, zone, rule, direction: "input" }) %}
+{% 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 %}
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 %}
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 (local rule in fw4.rules("forward")): %}
+{% for (let rule in fw4.rules("forward")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
-
-{% for (local zone in fw4.zones()): for (local rule in zone.match_rules): %}
- {%+ include("zone-match.uc", { fw4, zone, rule, direction: "forward" }) %}
+{% for (let zone in fw4.zones()): for (let rule in zone.match_rules): %}
+ {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "forward" }) %}
{% endfor; endfor %}
-
{% if (fw4.forward_policy() == "reject"): %}
jump handle_reject
{% endif %}
oifname "lo" accept comment "!fw4: Accept traffic towards loopback"
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 (local rule in fw4.rules("output")): %}
+{% for (let rule in fw4.rules("output")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
-
-{% for (local zone in fw4.zones()): for (local rule in zone.match_rules): %}
- {%+ include("zone-match.uc", { fw4, zone, rule, direction: "output" }) %}
+{% for (let zone in fw4.zones()): for (let rule in zone.match_rules): %}
+ {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "output" }) %}
{% endfor; endfor %}
-
{% if (fw4.output_policy() == "reject"): %}
jump handle_reject
{% endif %}
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 ${fw4.default_option("any_reject_code")}`
: "tcp reset"
}} comment "!fw4: Reject any other traffic"
}
-{% if (fw4.default_option("synflood_protect")):
- local r = fw4.default_option("synflood_rate");
- local b = fw4.default_option("synflood_burst");
+{% if (fw4.default_option("synflood_protect") && fw4.default_option("synflood_rate")):
+ let r = fw4.default_option("synflood_rate");
+ let b = fw4.default_option("synflood_burst");
%}
chain syn_flood {
- tcp flags & (fin | syn | rst | ack) == syn
- {%- if (r): %} limit rate {{ r.rate }}/{{ r.unit }}{% endif %}
+ limit rate {{ r.rate }}/{{ r.unit }}
{%- if (b): %} burst {{ b }} packets{% endif %} return comment "!fw4: Accept SYN packets below rate-limit"
drop comment "!fw4: Drop excess packets"
}
{% endif %}
-
-{% for (local zone in fw4.zones()): %}
+{% for (let zone in fw4.zones()): %}
chain input_{{ zone.name }} {
-{% for (local rule in fw4.rules("input_"+zone.name)): %}
+{% for (let rule in fw4.rules(`input_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
{% if (zone.dflags.dnat): %}
}
chain output_{{ zone.name }} {
-{% for (local rule in fw4.rules("output_"+zone.name)): %}
+{% for (let rule in fw4.rules(`output_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
jump {{ zone.output }}_to_{{ zone.name }}
}
chain forward_{{ zone.name }} {
-{% for (local rule in fw4.rules("forward_"+zone.name)): %}
+{% for (let rule in fw4.rules(`forward_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
{% if (zone.dflags.dnat): %}
jump {{ zone.forward }}_to_{{ zone.name }}
}
-{% for (local verdict in ["accept", "reject", "drop"]): %}
+{% for (let verdict in ["accept", "reject", "drop"]): %}
{% if (zone.sflags[verdict]): %}
chain {{ verdict }}_from_{{ zone.name }} {
-{% for (local rule in zone.match_rules): %}
+{% 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 (local rule in zone.match_rules): %}
+{% for (let rule in zone.match_rules): %}
{%+ include("zone-verdict.uc", { fw4, zone, rule, egress: true, verdict }) %}
{% endfor %}
}
{% endfor %}
{% endfor %}
-
#
# NAT rules
#
chain dstnat {
type nat hook prerouting priority dstnat; policy accept;
-
{% for (let zone in fw4.zones()): %}
{% if (zone.dflags.dnat): %}
{% for (let rule in zone.match_rules): %}
- {%+ include("zone-match.uc", { fw4, zone, rule, direction: "dstnat" }) %}
+ {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "dstnat" }) %}
{% endfor %}
{% endif %}
{% endfor %}
chain srcnat {
type nat hook postrouting priority srcnat; policy accept;
-
{% 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-match.uc", { fw4, zone, rule, direction: "srcnat" }) %}
+ {%+ include("zone-jump.uc", { fw4, zone, rule, direction: "srcnat" }) %}
{% endfor %}
{% endif %}
{% endfor %}
{% 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 %}
}
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)): %}
+{% 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): %}
{%+ 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 -%}
+ {%+ include("zone-match.uc", { fw4, egress: false, rule: { ...rule, devices_pos, subnets_pos } }) -%}
jump {{ target }}_{{ zone.name }} comment "!fw4: {{ zone.name }} {{ fw4.nfproto(rule.family, true) }} {{
(target == "helper") ? "CT helper assignment" : "CT bypass"
}}"
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)): %}
+{% 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): %}
{%+ 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 -%}
+ {%+ include("zone-match.uc", { fw4, egress: false, rule: { ...rule, devices_pos, subnets_pos } }) -%}
jump {{ target }}_{{ zone.name }} comment "!fw4: {{ zone.name }} {{ fw4.nfproto(rule.family, true) }} {{
(target == "helper") ? "CT helper assignment" : "CT bypass"
}}"
{% 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 rule in fw4.rules(`${target}_${zone.name}`)): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
}
{% endfor %}
{% endfor %}
-
#
# Mangle rules
#
chain mangle_prerouting {
type filter hook prerouting priority mangle; policy accept;
-
{% for (let rule in fw4.rules("mangle_prerouting")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
}
- chain mangle_output {
- type filter hook output priority mangle; policy accept;
+ chain mangle_postrouting {
+ type filter hook postrouting priority mangle; policy accept;
+{% for (let rule in fw4.rules("mangle_postrouting")): %}
+ {%+ include("rule.uc", { fw4, rule }) %}
+{% endfor %}
+ }
+ chain mangle_input {
+ type filter hook input priority mangle; policy accept;
+{% for (let rule in fw4.rules("mangle_input")): %}
+ {%+ include("rule.uc", { fw4, rule }) %}
+{% endfor %}
+ }
+
+ chain mangle_output {
+ type route hook output priority mangle; policy accept;
{% for (let rule in fw4.rules("mangle_output")): %}
{%+ include("rule.uc", { fw4, rule }) %}
{% endfor %}
chain mangle_forward {
type filter hook forward priority mangle; policy accept;
-
+{% 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): %}
projects / project / firewall4.git / blobdiff