adds a new uci firewall - iptbales and netfilter packages need to be rewrapped when we switch to this firewall as default - there are some examples in the file /etc/config/firewall - iptables-save/restore are still missing - hotplug takes care of adding/removing netdevs during runtime - misisng features ? wishes ? let me know ...
SVN-Revision: 12089
This commit is contained in:
John Crispin
parent
e4a0bfec3c
commit
21bbdc24c3
@ -14,7 +14,7 @@ DEVICE_TYPE?=router
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# Default packages - the really basic set
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DEFAULT_PACKAGES:=base-files libgcc uclibc busybox dropbear mtd uci
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# For router targets
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DEFAULT_PACKAGES.router:=dnsmasq iptables ppp ppp-mod-pppoe kmod-ipt-nathelper bridge
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DEFAULT_PACKAGES.router:=dnsmasq iptables ppp ppp-mod-pppoe kmod-ipt-nathelper bridge firewall
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# Additional packages for Linux 2.6
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ifneq ($(KERNEL),2.4)
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17
package/firewall/Config.in
Normal file
17
package/firewall/Config.in
Normal file
@ -0,0 +1,17 @@
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choice
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prompt "Choose firewall"
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default FIREWALL_OLD
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depends PACKAGE_firewall
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config FIREWALL_OLD
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bool "old firewall"
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config FIREWALL_NEW
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bool "new uci firewall"
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select PACKAGE_iptables-mod-conntrack
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select PACKAGE_iptables-mod-extra
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select PACKAGE_iptables-mod-ipopt
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select PACKAGE_iptables-mod-ulog
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select PACKAGE_kmod-ipt-nathelper
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endchoice
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69
package/firewall/Makefile
Normal file
69
package/firewall/Makefile
Normal file
@ -0,0 +1,69 @@
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#
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# Copyright (C) 2008 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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include $(TOPDIR)/rules.mk
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PKG_NAME:=firewall
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PKG_VERSION:=1
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PKG_RELEASE:=1
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include $(INCLUDE_DIR)/package.mk
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define Package/firewall
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SECTION:=net
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CATEGORY:=Base system
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URL:=http://openwrt.org/
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TITLE:=OpenWrt firewall
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DEPENDS:=+iptables
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endef
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define Package/firewall/description
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firewall for openwrt, you can select if you want to use the old version or the new uci based script
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endef
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define Package/firewall/config
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source "$(SOURCE)/Config.in"
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endef
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define Build/Compile
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true
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endef
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ifeq ($(CONFIG_FIREWALL_NEW),y)
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define Package/firewall/conffiles
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/etc/config/firewall
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endef
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define Package/firewall/install
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$(INSTALL_DIR) $(1)/lib/firewall
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$(INSTALL_DATA) ./files/new/uci_firewall.sh $(1)/lib/firewall
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$(INSTALL_DIR) $(1)/etc/config
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$(INSTALL_DATA) ./files/new/firewall.config $(1)/etc/config/firewall
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$(INSTALL_DIR) $(1)/etc/init.d/
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$(INSTALL_BIN) ./files/new/firewall.init $(1)/etc/init.d/firewall
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$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
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$(INSTALL_DATA) ./files/new/20-firewall $(1)/etc/hotplug.d/iface
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endef
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else
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define Package/firewall/conffiles
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/etc/firewall.config
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/etc/firewall.user
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endef
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define Package/firewall/install
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$(INSTALL_DIR) $(1)/etc/config
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$(INSTALL_DATA) ./files/old/firewall.config $(1)/etc/
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$(INSTALL_DIR) $(1)/etc/init.d
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$(INSTALL_BIN) ./files/old/firewall.init $(1)/etc/init.d/firewall
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$(INSTALL_BIN) ./files/old/firewall.user $(1)/etc/
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$(INSTALL_DIR) $(1)/usr/lib
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$(INSTALL_DATA) ./files/old/firewall.awk $(1)/usr/lib
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endef
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endif
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$(eval $(call BuildPackage,firewall))
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41
package/firewall/files/new/20-firewall
Normal file
41
package/firewall/files/new/20-firewall
Normal file
@ -0,0 +1,41 @@
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. /lib/firewall/uci_firewall.sh
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unset ZONE
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config_get ifname $INTERFACE ifname
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INTERFACE=$ifname
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[ "$INTERFACE" == "lo" ] && exit 0
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load_zones() {
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local name
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local network
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config_get name $1 name
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config_get network $1 network
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[ -z "$network" ] && return
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for n in $network; do
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local ifname
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config_get ifname $n ifname
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list_contains ifname $INTERFACE && {
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list_contains ZONE $name || ZONE="$ZONE $name"
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}
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done
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}
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config_foreach load_zones zone
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IFACE=$(find_config $INTERFACE)
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[ -n "$IFACE" ] &&
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list_contains ZONE $IFACE || ZONE="$ZONE $IFACE"
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[ ifup = "$ACTION" ] && {
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for z in $ZONE; do
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local loaded
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config_get loaded core loaded
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[ -n "$loaded" ] && addif $INTERFACE $z
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done
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}
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[ ifdown = "$ACTION" ] && {
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for z in $ZONE; do
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local up
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config_get up $z up
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[ "$up" == "1" ] && delif $INTERFACE $z
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done
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}
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80
package/firewall/files/new/firewall.config
Executable file
80
package/firewall/files/new/firewall.config
Executable file
@ -0,0 +1,80 @@
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config defaults
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option syn_flood 1
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option input DROP
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option output ACCEPT
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option forward DROP
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config zone
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option name lan
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option input ACCEPT
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option output ACCEPT
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option forward DROP
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config zone
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option name wan
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option input DROP
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option output ACCEPT
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option forward DROP
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option masq 1
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config forwarding
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option src lan
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option dest wan
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### EXAMPLE CONFIG SECTIONS
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# do not allow a specific ip to access wan
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#config rule
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# option src lan
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# option src_ip 192.168.45.2
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# option dest wan
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# option proto tcp
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# option target REJECT
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# block a specific mac on wan
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#config rule
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# option dest wan
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# option src_mac 00:11:22:33:44:66
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# option target REJECT
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# block incoming ICMP traffic on a zone
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#config rule
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# option src lan
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# option proto ICMP
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# option target DROP
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# port redirect port coming in on wan to lan
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#config redirect
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# option src wan
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# option src_dport 80
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# option dest lan
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# option dest_ip 192.168.16.235
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# option dest_port 80
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# option protocol tcp
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# include a file with users custom iptables rules
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#config include
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# option path /etc/firewall.user
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### FULL CONFIG SECTIONS
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#config rule
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# option src lan
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# option src_ip 192.168.45.2
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# option src_mac 00:11:22:33:44:55
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# option src_port 80
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# option dest wan
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# option dest_ip 194.25.2.129
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# option dest_port 120
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# option proto tcp
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# option target REJECT
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#config redirect
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# option src lan
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# option src_ip 192.168.45.2
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# option src_mac 00:11:22:33:44:55
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# option src_port 1024
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# option src_dport 80
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# option dest_ip 194.25.2.129
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# option dest_port 120
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# option proto tcp
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14
package/firewall/files/new/firewall.init
Executable file
14
package/firewall/files/new/firewall.init
Executable file
@ -0,0 +1,14 @@
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2008 OpenWrt.org
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START=45
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start() {
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. /lib/firewall/uci_firewall.sh
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fw_init
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}
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stop() {
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. /lib/firewall/uci_firewall.sh
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fw_stop
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}
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291
package/firewall/files/new/uci_firewall.sh
Executable file
291
package/firewall/files/new/uci_firewall.sh
Executable file
@ -0,0 +1,291 @@
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#!/bin/sh
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# Copyright (C) 2008 John Crispin <blogic@openwrt.org>
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. /etc/functions.sh
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IPTABLES="echo iptables"
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IPTABLES=iptables
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config_clear
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include /lib/network
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scan_interfaces
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CONFIG_APPEND=1
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config_load firewall
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config fw_zones
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ZONE_LIST=$CONFIG_SECTION
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DEF_INPUT=DROP
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DEF_OUTPUT=DROP
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DEF_FORWARD=DROP
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load_policy() {
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config_get input $1 input
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config_get output $1 output
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config_get forward $1 forward
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[ -z "$input" ] && input=$DEF_INPUT
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[ -z "$output" ] && output=$DEF_OUTPUT
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[ -z "$forward" ] && forward=$DEF_FORWARD
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}
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create_zone() {
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local exists
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[ "$1" == "loopback" ] && return
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config_get exists $ZONE_LIST $1
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[ -n "$exists" ] && return
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config_set $ZONE_LIST $1 1
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$IPTABLES -N zone_$1
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$IPTABLES -N zone_$1_ACCEPT
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$IPTABLES -N zone_$1_DROP
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$IPTABLES -N zone_$1_REJECT
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$IPTABLES -N zone_$1_forward
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$IPTABLES -A zone_$1_forward -j zone_$1_$5
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$IPTABLES -A zone_$1 -j zone_$1_$3
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$IPTABLES -A OUTPUT -j zone_$1_$4
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$IPTABLES -N zone_$1_nat -t nat
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$IPTABLES -N zone_$1_prerouting -t nat
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[ "$6" == "1" ] && $IPTABLES -t nat -A POSTROUTING -j zone_$2_nat
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}
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addif() {
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logger "adding $1 to firewall zone $2"
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$IPTABLES -A INPUT -i $1 -j zone_$2
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$IPTABLES -I zone_$2_ACCEPT 1 -o $1 -j ACCEPT
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$IPTABLES -I zone_$2_DROP 1 -o $1 -j DROP
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$IPTABLES -I zone_$2_REJECT 1 -o $1 -j REJECT
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$IPTABLES -I zone_$2_ACCEPT 1 -i $1 -j ACCEPT
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$IPTABLES -I zone_$2_DROP 1 -i $1 -j DROP
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$IPTABLES -I zone_$2_REJECT 1 -i $1 -j REJECT
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$IPTABLES -I zone_$2_nat 1 -t nat -o $1 -j MASQUERADE
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$IPTABLES -I PREROUTING 1 -t nat -i $1 -j zone_$2_prerouting
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$IPTABLES -A FORWARD -i $1 -j zone_$2_forward
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}
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delif() {
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logger "removing $1 from firewall zone $2"
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$IPTABLES -D INPUT -i $1 -j zone_$2
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$IPTABLES -D zone_$2_ACCEPT -o $1 -j ACCEPT
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$IPTABLES -D zone_$2_DROP -o $1 -j DROP
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$IPTABLES -D zone_$2_REJECT -o $1 -j REJECT
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$IPTABLES -D zone_$2_ACCEPT -i $1 -j ACCEPT
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$IPTABLES -D zone_$2_DROP -i $1 -j DROP
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$IPTABLES -D zone_$2_REJECT -i $1 -j REJECT
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$IPTABLES -D zone_$2_nat -t nat -o $1 -j MASQUERADE
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$IPTABLES -D PREROUTING -t nat -i $1 -j zone_$2_prerouting
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$IPTABLES -D FORWARD -i $1 -j zone_$2_forward
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}
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load_synflood() {
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echo "Loading synflood protection"
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$IPTABLES -N SYN_FLOOD
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$IPTABLES -A SYN_FLOOD -p tcp --syn -m limit --limit ${1}/second --limit-burst $2 -j RETURN
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$IPTABLES -A SYN_FLOOD -p ! tcp -j RETURN
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$IPTABLES -A SYN_FLOOD -p tcp ! --syn -j RETURN
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$IPTABLES -A SYN_FLOOD -j LOG --log-prefix "syn_flood: "
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$IPTABLES -A SYN_FLOOD -j DROP
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$IPTABLES -A INPUT -p tcp --syn -j SYN_FLOOD
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}
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create_network_zone() {
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create_zone "$1" "$1"
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}
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fw_defaults() {
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load_policy $1
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DEF_INPUT=$input
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DEF_OUTPUT=$output
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DEF_FORWARD=$forward
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echo 1 > /proc/sys/net/ipv4/tcp_syncookies
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for f in /proc/sys/net/ipv4/conf/*/accept_redirects
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do
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echo 0 > $f
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done
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for f in /proc/sys/net/ipv4/conf/*/accept_source_route
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do
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echo 0 > $f
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done
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$IPTABLES -F
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$IPTABLES -t nat -F
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$IPTABLES -t mangle -F
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$IPTABLES -X -t nat
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$IPTABLES -X
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$IPTABLES -P INPUT $input
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$IPTABLES -A INPUT -m state --state INVALID -j DROP
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$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
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$IPTABLES -P OUTPUT $output
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$IPTABLES -A OUTPUT -m state --state INVALID -j DROP
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$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
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$IPTABLES -P FORWARD $forward
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$IPTABLES -A FORWARD -m state --state INVALID -j DROP
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$IPTABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
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$IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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$IPTABLES -A INPUT -i lo -j ACCEPT
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$IPTABLES -A OUTPUT -o lo -j ACCEPT
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config_get syn_flood $1 syn_flood
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config_get syn_rate $1 syn_rate
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config_get syn_burst $1 syn_burst
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[ -z "$syn_rate" ] && syn_rate=25
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[ -z "$syn_burst" ] && syn_burst=50
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[ "$syn_flood" == "1" ] && load_synflood $syn_rate $syn_burst
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}
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fw_zone() {
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local name
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local network
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local masq
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config_get name $1 name
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config_get network $1 network
|
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config_get masq $1 masq
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load_policy $1
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[ -z "$network" ] && network=$name
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create_zone "$name" "$network" "$input" "$output" "$forward" "$masq"
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}
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fw_rule() {
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local src
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local src_ip
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local src_mac
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local src_port
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local src_mac
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local dest
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local dest_ip
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local dest_port
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local proto
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local target
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config_get src $1 src
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config_get src_ip $1 src_ip
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config_get src_mac $1 src_mac
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config_get src_port $1 src_port
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config_get dest $1 dest
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config_get dest_ip $1 dest_ip
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config_get dest_port $1 dest_port
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config_get proto $1 proto
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config_get target $1 target
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config_get ruleset $1 ruleset
|
||||
|
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[ -z "$target" ] && target=DROP
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[ -n "$src" ] && ZONE=zone_$src || ZONE=INPUT
|
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[ -n "$dest" ] && TARGET=zone_${dest}_$target || TARGET=$target
|
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$IPTABLES -I $ZONE 1 \
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${proto:+-p $proto} \
|
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${src_ip:+-s $src_ip} \
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${src_port:+--sport $src_port} \
|
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${src_mac:+-m mac --mac-source $src_mac} \
|
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${dest_ip:+-d $dest_ip} \
|
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${dest_port:+--dport $dest_port} \
|
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-j $TARGET
|
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}
|
||||
|
||||
fw_forwarding() {
|
||||
local src
|
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local dest
|
||||
local masq
|
||||
|
||||
config_get src $1 src
|
||||
config_get dest $1 dest
|
||||
[ -n "$src" ] && z_src=zone_${src}_forward || z_src=FORWARD
|
||||
[ -n "$dest" ] && z_dest=zone_${dest}_ACCEPT || z_dest=ACCEPT
|
||||
$IPTABLES -I $z_src 1 -j $z_dest
|
||||
}
|
||||
|
||||
fw_redirect() {
|
||||
local src
|
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local src_ip
|
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local src_port
|
||||
local src_dport
|
||||
local src_mac
|
||||
local dest_ip
|
||||
local dest_port
|
||||
local protocol
|
||||
|
||||
config_get src $1 src
|
||||
config_get src_ip $1 src_ip
|
||||
config_get src_port $1 src_port
|
||||
config_get src_dport $1 src_dport
|
||||
config_get src_mac $1 src_mac
|
||||
config_get dest_ip $1 dest_ip
|
||||
config_get dest_port $1 dest_port
|
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config_get protocol $1 protocol
|
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[ -z "$src" -o -z "$dest_ip" ] && { \
|
||||
echo "redirect needs src and dest_ip"; return ; }
|
||||
$IPTABLES -A zone_${src}_prerouting -t nat \
|
||||
${protocol:+-p $protocol} \
|
||||
${src_ip:+-s $srcdip} \
|
||||
${src_port:+--sport $src_port} \
|
||||
${src_dport:+--dport $src_dport} \
|
||||
${src_mac:+-m mac --mac-source $src_mac} \
|
||||
-j DNAT --to-destination $dest_ip${dest_port:+:$dest_port}
|
||||
$IPTABLES -I zone_${src}_forward 1 \
|
||||
${protocol:+-p $protocol} \
|
||||
-d $dest_ip \
|
||||
${src_ip:+-s $srcdip} \
|
||||
${src_port:+--sport $src_port} \
|
||||
${dest_port:+--dport $dest_port} \
|
||||
${src_mac:+-m mac --mac-source $src_mac} \
|
||||
-j ACCEPT
|
||||
}
|
||||
|
||||
fw_include() {
|
||||
local path
|
||||
config_get path $1 path
|
||||
[ -e $path ] && . $path
|
||||
}
|
||||
|
||||
fw_addif() {
|
||||
local up
|
||||
local ifname
|
||||
config_get up $1 up
|
||||
config_get ifname $1 ifname
|
||||
[ -n "$up" ] || return 0
|
||||
(ACTION="ifup" INTERFACE="$1" . /etc/hotplug.d/iface/20-firewall)
|
||||
}
|
||||
|
||||
fw_init() {
|
||||
echo "Loading defaults"
|
||||
config_foreach fw_defaults defaults
|
||||
echo "Loading zones"
|
||||
config_foreach fw_zone zone
|
||||
echo "Loading interfaces"
|
||||
config_foreach create_network_zone interface
|
||||
echo "Loading rules"
|
||||
config_foreach fw_rule rule
|
||||
echo "Loading forwarding"
|
||||
config_foreach fw_forwarding forwarding
|
||||
echo "Loading redirects"
|
||||
config_foreach fw_redirect redirect
|
||||
echo "Loading includes"
|
||||
config_foreach fw_include include
|
||||
|
||||
uci_set_state firewall core "" firewall_state
|
||||
uci_set_state firewall core loaded 1
|
||||
unset CONFIG_APPEND
|
||||
config_load network
|
||||
config_foreach fw_addif interface
|
||||
}
|
||||
|
||||
fw_stop() {
|
||||
$IPTABLES -F
|
||||
$IPTABLES -t nat -F
|
||||
$IPTABLES -t mangle -F
|
||||
$IPTABLES -X -t nat
|
||||
$IPTABLES -X
|
||||
$IPTABLES -P INPUT ACCEPT
|
||||
$IPTABLES -P OUTPUT ACCEPT
|
||||
$IPTABLES -P FORWARD ACCEPT
|
||||
}
|
||||
@ -58,11 +58,6 @@ $(call Package/iptables/Default)
|
||||
MENU:=1
|
||||
endef
|
||||
|
||||
define Package/iptables/conffiles
|
||||
/etc/firewall.config
|
||||
/etc/firewall.user
|
||||
endef
|
||||
|
||||
define Package/iptables-mod-conntrack
|
||||
$(call Package/iptables/Module, +kmod-ipt-conntrack)
|
||||
TITLE:=connection tracking modules
|
||||
@ -247,13 +242,6 @@ define Build/InstallDev
|
||||
endef
|
||||
|
||||
define Package/iptables/install
|
||||
$(INSTALL_DIR) $(1)/etc/config
|
||||
$(INSTALL_DATA) ./files/firewall.config $(1)/etc/
|
||||
$(INSTALL_DIR) $(1)/etc/init.d
|
||||
$(INSTALL_BIN) ./files/firewall.init $(1)/etc/init.d/firewall
|
||||
$(INSTALL_BIN) ./files/firewall.user $(1)/etc/
|
||||
$(INSTALL_DIR) $(1)/usr/lib
|
||||
$(INSTALL_DATA) ./files/firewall.awk $(1)/usr/lib
|
||||
$(INSTALL_DIR) $(1)/usr/sbin
|
||||
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/iptables $(1)/usr/sbin/
|
||||
$(INSTALL_DIR) $(1)/usr/lib/iptables
|
||||
|
||||
Loading…
Reference in New Issue
Block a user