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domenico
2025-06-24 16:03:39 +02:00
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62
package/network/config/firewall/Makefile Normal file
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#
# Copyright (C) 2013-2016 OpenWrt.org
# Copyright (C) 2016 LEDE project
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
PKG_NAME:=firewall
PKG_RELEASE:=3
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL=$(PROJECT_GIT)/project/firewall3.git
PKG_SOURCE_DATE:=2019-11-22
PKG_SOURCE_VERSION:=8174814a507489ebbe8bb85c1004e1f02919ca82
PKG_MIRROR_HASH:=84e0cca2d47470bdb1788a8ae044cc425be8ff650a1137474ba43a15040085da
PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
PKG_LICENSE:=ISC
PKG_CONFIG_DEPENDS := CONFIG_IPV6
include $(INCLUDE_DIR)/package.mk
include $(INCLUDE_DIR)/cmake.mk
define Package/firewall
SECTION:=net
CATEGORY:=Base system
TITLE:=OpenWrt C Firewall
DEPENDS:=+libubox +libubus +libuci +libip4tc +IPV6:libip6tc +libxtables +kmod-ipt-core +kmod-ipt-conntrack +IPV6:kmod-nf-conntrack6 +kmod-ipt-nat
endef
define Package/firewall/description
This package provides a config-compatible C implementation of the UCI firewall.
endef
define Package/firewall/conffiles
/etc/config/firewall
/etc/firewall.user
endef
TARGET_CFLAGS += -ffunction-sections -fdata-sections -flto
TARGET_LDFLAGS += -Wl,--gc-sections -flto
CMAKE_OPTIONS += $(if $(CONFIG_IPV6),,-DDISABLE_IPV6=1)
define Package/firewall/install
$(INSTALL_DIR) $(1)/sbin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/firewall3 $(1)/sbin/fw3
$(INSTALL_DIR) $(1)/etc/init.d
$(INSTALL_BIN) ./files/firewall.init $(1)/etc/init.d/firewall
$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
$(INSTALL_CONF) ./files/firewall.hotplug $(1)/etc/hotplug.d/iface/20-firewall
$(INSTALL_DIR) $(1)/etc/config/
$(INSTALL_CONF) ./files/firewall.config $(1)/etc/config/firewall
$(INSTALL_DIR) $(1)/etc/
$(INSTALL_CONF) ./files/firewall.user $(1)/etc/firewall.user
$(INSTALL_DIR) $(1)/usr/share/fw3
$(INSTALL_CONF) $(PKG_BUILD_DIR)/helpers.conf $(1)/usr/share/fw3
endef
$(eval $(call BuildPackage,firewall))

195
package/network/config/firewall/files/firewall.config Normal file
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config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
# Uncomment this line to disable ipv6 rules
# option disable_ipv6 1
config zone
option name lan
list network 'lan'
option input ACCEPT
option output ACCEPT
option forward ACCEPT
config zone
option name wan
list network 'wan'
list network 'wan6'
option input REJECT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option name Allow-DHCP-Renew
option src wan
option proto udp
option dest_port 68
option target ACCEPT
option family ipv4
# Allow IPv4 ping
config rule
option name Allow-Ping
option src wan
option proto icmp
option icmp_type echo-request
option family ipv4
option target ACCEPT
config rule
option name Allow-IGMP
option src wan
option proto igmp
option family ipv4
option target ACCEPT
# Allow DHCPv6 replies
# see https://dev.openwrt.org/ticket/10381
config rule
option name Allow-DHCPv6
option src wan
option proto udp
option src_ip fc00::/6
option dest_ip fc00::/6
option dest_port 546
option family ipv6
option target ACCEPT
config rule
option name Allow-MLD
option src wan
option proto icmp
option src_ip fe80::/10
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family ipv6
option target ACCEPT
# Allow essential incoming IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Input
option src wan
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
list icmp_type router-solicitation
list icmp_type neighbour-solicitation
list icmp_type router-advertisement
list icmp_type neighbour-advertisement
option limit 1000/sec
option family ipv6
option target ACCEPT
# Allow essential forwarded IPv6 ICMP traffic
config rule
option name Allow-ICMPv6-Forward
option src wan
option dest *
option proto icmp
list icmp_type echo-request
list icmp_type echo-reply
list icmp_type destination-unreachable
list icmp_type packet-too-big
list icmp_type time-exceeded
list icmp_type bad-header
list icmp_type unknown-header-type
option limit 1000/sec
option family ipv6
option target ACCEPT
config rule
option name Allow-IPSec-ESP
option src wan
option dest lan
option proto esp
option target ACCEPT
config rule
option name Allow-ISAKMP
option src wan
option dest lan
option dest_port 500
option proto udp
option target ACCEPT
# include a file with users custom iptables rules
config include
option path /etc/firewall.user
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 80
# option dest lan
# option dest_ip 192.168.16.235
# option dest_port 80
# option proto tcp
# port redirect of remapped ssh port (22001) on wan
#config redirect
# option src wan
# option src_dport 22001
# option dest lan
# option dest_port 22
# option proto tcp
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp

11
package/network/config/firewall/files/firewall.hotplug Normal file
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#!/bin/sh
[ "$ACTION" = ifup -o "$ACTION" = ifupdate ] || exit 0
[ "$ACTION" = ifupdate -a -z "$IFUPDATE_ADDRESSES" -a -z "$IFUPDATE_DATA" ] && exit 0
/etc/init.d/firewall enabled || exit 0
fw3 -q network "$INTERFACE" >/dev/null || exit 0
logger -t firewall "Reloading firewall due to $ACTION of $INTERFACE ($DEVICE)"
fw3 -q reload

61
package/network/config/firewall/files/firewall.init Executable file
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#!/bin/sh /etc/rc.common
START=19
USE_PROCD=1
QUIET=""
validate_firewall_redirect()
{
uci_validate_section firewall redirect "${1}" \
'proto:or(uinteger, string)' \
'src:string' \
'src_ip:cidr' \
'src_dport:or(port, portrange)' \
'dest:string' \
'dest_ip:cidr' \
'dest_port:or(port, portrange)' \
'target:or("SNAT", "DNAT")'
}
validate_firewall_rule()
{
uci_validate_section firewall rule "${1}" \
'proto:or(uinteger, string)' \
'src:string' \
'dest:string' \
'src_port:or(port, portrange)' \
'dest_port:or(port, portrange)' \
'target:string'
}
service_triggers() {
procd_add_reload_trigger firewall
procd_open_validate
validate_firewall_redirect
validate_firewall_rule
procd_close_validate
}
restart() {
fw3 restart
}
start_service() {
fw3 ${QUIET} start
}
stop_service() {
fw3 flush
}
reload_service() {
fw3 reload
}
boot() {
# Be silent on boot, firewall might be started by hotplug already,
# so don't complain in syslog.
QUIET=-q
start
}

7
package/network/config/firewall/files/firewall.user Normal file
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# This file is interpreted as shell script.
# Put your custom iptables rules here, they will
# be executed with each firewall (re-)start.
# Internal uci firewall chains are flushed and recreated on reload, so
# put custom rules into the root chains e.g. INPUT or FORWARD or into the
# special user chains, e.g. input_wan_rule or postrouting_lan_rule.

33
package/network/config/firewall/patches/0001-zones-apply-tcp-mss-clamping-also-on-ingress-path.patch Normal file
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From 4a7df7d8c4e40fd2ce0d9f125755249dee17a8bd Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Fri, 24 Jul 2020 12:52:59 +0800
Subject: [PATCH] zones: apply tcp mss clamping also on ingress path
Fixes FS#3231
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit e9b90dfac2225927c035f6a76277b850c282dc9a)
---
zones.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/zones.c b/zones.c
index 01fb706..3d54a76 100644
--- a/zones.c
+++ b/zones.c
@@ -552,6 +552,14 @@ print_interface_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
fw3_ipt_rule_target(r, "TCPMSS");
fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
fw3_ipt_rule_replace(r, "FORWARD");
+
+ r = fw3_ipt_rule_create(handle, &tcp, dev, NULL, sub, NULL);
+ fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
+ fw3_ipt_rule_addarg(r, false, "SYN", NULL);
+ fw3_ipt_rule_comment(r, "Zone %s MTU fixing", zone->name);
+ fw3_ipt_rule_target(r, "TCPMSS");
+ fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
+ fw3_ipt_rule_replace(r, "FORWARD");
}
}
else if (handle->table == FW3_TABLE_RAW)

38
package/network/config/firewall/patches/0002-options-fix-parsing-of-boolean-attributes.patch Normal file
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From 78d52a28c66ad0fd2af250038fdcf4239ad37bf2 Mon Sep 17 00:00:00 2001
From: Remi NGUYEN VAN <remi.nguyenvan+openwrt@gmail.com>
Date: Sat, 15 Aug 2020 13:50:27 +0900
Subject: [PATCH] options: fix parsing of boolean attributes
Boolean attributes were parsed the same way as string attributes,
so a value of { "bool_attr": "true" } would be parsed correctly, but
{ "bool_attr": true } (without quotes) was parsed as false.
Fixes FS#3284
Signed-off-by: Remi NGUYEN VAN <remi.nguyenvan+openwrt@gmail.com>
---
options.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/options.c
+++ b/options.c
@@ -1170,6 +1170,9 @@ fw3_parse_blob_options(void *s, const st
if (blobmsg_type(e) == BLOBMSG_TYPE_INT32) {
snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(e));
v = buf;
+ } else if (blobmsg_type(o) == BLOBMSG_TYPE_BOOL) {
+ snprintf(buf, sizeof(buf), "%d", blobmsg_get_bool(o));
+ v = buf;
} else {
v = blobmsg_get_string(e);
}
@@ -1189,6 +1192,9 @@ fw3_parse_blob_options(void *s, const st
if (blobmsg_type(o) == BLOBMSG_TYPE_INT32) {
snprintf(buf, sizeof(buf), "%d", blobmsg_get_u32(o));
v = buf;
+ } else if (blobmsg_type(o) == BLOBMSG_TYPE_BOOL) {
+ snprintf(buf, sizeof(buf), "%d", blobmsg_get_bool(o));
+ v = buf;
} else {
v = blobmsg_get_string(o);
}