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ruleset: apply loopback in/out rules later #56

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0e76fb4
Re-order loopback accept
brada4 Apr 9, 2025
8d7182e
Propagate change to test suite
brada4 Apr 9, 2025
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6 changes: 2 additions & 4 deletions root/usr/share/firewall4/templates/ruleset.uc
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Original file line number Diff line number Diff line change
Expand Up @@ -112,10 +112,9 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy {{ fw4.input_policy(true) }};

iif "lo" accept comment "!fw4: Accept traffic from loopback"

{% fw4.includes('chain-prepend', 'input') %}
ct state vmap { established : accept, related : accept{% if (fw4.default_option("drop_invalid")): %}, invalid : drop{% endif %} } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
{% 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 %}
Expand Down Expand Up @@ -154,10 +153,9 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy {{ fw4.output_policy(true) }};

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

{% fw4.includes('chain-prepend', 'output') %}
ct state vmap { established : accept, related : accept{% if (fw4.default_option("drop_invalid")): %}, invalid : drop{% endif %} } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
{% for (let rule in fw4.rules("output")): %}
{%+ include("rule.uc", { fw4, zone: null, rule }) %}
{% endfor %}
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6 changes: 2 additions & 4 deletions tests/01_configuration/01_ruleset
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Original file line number Diff line number Diff line change
Expand Up @@ -110,9 +110,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
tcp flags & (fin | syn | rst | ack) == syn jump syn_flood comment "!fw4: Rate limit TCP syn packets"
iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
iifname "pppoe-wan" jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
Expand All @@ -132,9 +131,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy accept;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
meta l4proto tcp counter comment "!fw4: Test-Deprecated-Rule-Option"
oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
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6 changes: 2 additions & 4 deletions tests/01_configuration/02_rule_order
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Original file line number Diff line number Diff line change
Expand Up @@ -91,9 +91,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
iifname "pppoe-wan" jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
}
Expand All @@ -109,9 +108,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
}
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6 changes: 2 additions & 4 deletions tests/02_zones/01_policies
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Original file line number Diff line number Diff line change
Expand Up @@ -93,9 +93,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
iifname "zone2" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
iifname "zone3" jump input_test3 comment "!fw4: Handle test3 IPv4/IPv6 input traffic"
Expand All @@ -113,9 +112,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
oifname "zone2" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
oifname "zone3" jump output_test3 comment "!fw4: Handle test3 IPv4/IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/02_masq
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Original file line number Diff line number Diff line change
Expand Up @@ -97,9 +97,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
iifname "zone2" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
iifname "zone3" jump input_test3 comment "!fw4: Handle test3 IPv4/IPv6 input traffic"
Expand All @@ -117,9 +116,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
oifname "zone2" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
oifname "zone3" jump output_test3 comment "!fw4: Handle test3 IPv4/IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/03_masq_src_dest_restrictions
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Expand Up @@ -120,9 +120,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
iifname "zone2" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
}
Expand All @@ -138,9 +137,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
oifname "zone2" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
}
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/04_masq_allow_invalid
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Expand Up @@ -69,9 +69,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
}

Expand All @@ -85,9 +84,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
}

Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/04_wildcard_devices
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Expand Up @@ -120,9 +120,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
iifname "/never/" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
iifname "test*" jump input_test3 comment "!fw4: Handle test3 IPv4/IPv6 input traffic"
Expand Down Expand Up @@ -152,9 +151,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
oifname "/never/" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
oifname "test*" jump output_test3 comment "!fw4: Handle test3 IPv4/IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/05_subnet_mask_matches
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Expand Up @@ -79,9 +79,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
meta nfproto ipv6 ip6 saddr & ::ffff == ::1 ip6 saddr & ::ffff != ::2 jump input_test1 comment "!fw4: Handle test1 IPv6 input traffic"
meta nfproto ipv6 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::1 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 jump input_test2 comment "!fw4: Handle test2 IPv6 input traffic"
meta nfproto ipv6 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::2 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 jump input_test2 comment "!fw4: Handle test2 IPv6 input traffic"
Expand All @@ -101,9 +100,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
meta nfproto ipv6 ip6 daddr & ::ffff == ::1 ip6 daddr & ::ffff != ::2 jump output_test1 comment "!fw4: Handle test1 IPv6 output traffic"
meta nfproto ipv6 ip6 daddr != { ::7, ::8 } ip6 daddr & ::ffff == ::1 ip6 daddr & ::ffff != ::5 ip6 daddr & ::ffff != ::6 jump output_test2 comment "!fw4: Handle test2 IPv6 output traffic"
meta nfproto ipv6 ip6 daddr != { ::7, ::8 } ip6 daddr & ::ffff == ::2 ip6 daddr & ::ffff != ::5 ip6 daddr & ::ffff != ::6 jump output_test2 comment "!fw4: Handle test2 IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/06_family_selections
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Expand Up @@ -134,9 +134,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
meta nfproto ipv4 ip saddr 10.0.0.0/8 jump input_test1 comment "!fw4: Handle test1 IPv4 input traffic"
meta nfproto ipv6 ip6 saddr 2001:db8:1234::/64 jump input_test2 comment "!fw4: Handle test2 IPv6 input traffic"
meta nfproto ipv6 ip6 saddr 2001:db8:1234::/64 jump input_test3 comment "!fw4: Handle test3 IPv6 input traffic"
Expand All @@ -160,9 +159,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
meta nfproto ipv4 ip daddr 10.0.0.0/8 jump output_test1 comment "!fw4: Handle test1 IPv4 output traffic"
meta nfproto ipv6 ip6 daddr 2001:db8:1234::/64 jump output_test2 comment "!fw4: Handle test2 IPv6 output traffic"
meta nfproto ipv6 ip6 daddr 2001:db8:1234::/64 jump output_test3 comment "!fw4: Handle test3 IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/07_helpers
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Expand Up @@ -166,9 +166,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname "zone1" jump input_test1 comment "!fw4: Handle test1 IPv4/IPv6 input traffic"
iifname "zone2" jump input_test2 comment "!fw4: Handle test2 IPv4/IPv6 input traffic"
iifname "zone3" jump input_test3 comment "!fw4: Handle test3 IPv4/IPv6 input traffic"
Expand All @@ -188,9 +187,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "zone1" jump output_test1 comment "!fw4: Handle test1 IPv4/IPv6 output traffic"
oifname "zone2" jump output_test2 comment "!fw4: Handle test2 IPv4/IPv6 output traffic"
oifname "zone3" jump output_test3 comment "!fw4: Handle test3 IPv4/IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/02_zones/08_log_limit
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Expand Up @@ -238,9 +238,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
tcp dport 1007 counter log prefix "@rule[6]: " comment "!fw4: @rule[6]"
tcp dport 1008 counter comment "!fw4: @rule[7]"
tcp dport 1009 limit rate 5/minute log prefix "@rule[12]: "
Expand All @@ -267,9 +266,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
meta nfproto ipv4 oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4 output traffic"
oifname "br-guest" jump output_guest comment "!fw4: Handle guest IPv4/IPv6 output traffic"
Expand Down
6 changes: 2 additions & 4 deletions tests/03_rules/01_direction
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Expand Up @@ -69,9 +69,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
counter comment "!fw4: @rule[1]"
}

Expand All @@ -85,9 +84,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
counter comment "!fw4: @rule[0]"
counter comment "!fw4: @rule[2]"
}
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6 changes: 2 additions & 4 deletions tests/03_rules/02_enabled
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Expand Up @@ -66,9 +66,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
}

chain forward {
Expand All @@ -80,9 +79,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
counter comment "!fw4: Implicitly enabled"
counter comment "!fw4: Explicitly enabled"
}
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6 changes: 2 additions & 4 deletions tests/03_rules/03_constraints
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Expand Up @@ -105,9 +105,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
}

chain forward {
Expand All @@ -119,9 +118,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
meta nfproto ipv4 ip dscp 0x0 counter comment "!fw4: DSCP match rule #1"
meta nfproto ipv6 ip6 dscp 0x0 counter comment "!fw4: DSCP match rule #1"
}
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6 changes: 2 additions & 4 deletions tests/03_rules/04_icmp
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Expand Up @@ -75,9 +75,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
}

chain forward {
Expand All @@ -89,9 +88,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
meta l4proto { "icmp", "ipv6-icmp" } counter comment "!fw4: ICMP rule #1"
meta nfproto ipv6 meta l4proto ipv6-icmp counter comment "!fw4: ICMP rule #2"
meta nfproto ipv6 meta l4proto ipv6-icmp counter comment "!fw4: ICMP rule #3"
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6 changes: 2 additions & 4 deletions tests/03_rules/05_mangle
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Expand Up @@ -176,9 +176,8 @@ table inet fw4 {
chain input {
type filter hook input priority filter; policy drop;

iif "lo" accept comment "!fw4: Accept traffic from loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
iif "lo" accept comment "!fw4: Accept traffic from loopback"
iifname { "eth0", "eth1" } jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
iifname { "eth2", "eth3" } jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
}
Expand All @@ -194,9 +193,8 @@ table inet fw4 {
chain output {
type filter hook output priority filter; policy drop;

oif "lo" accept comment "!fw4: Accept traffic towards loopback"

ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
oif "lo" accept comment "!fw4: Accept traffic towards loopback"
oifname { "eth0", "eth1" } jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
oifname { "eth2", "eth3" } jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
}
Expand Down
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