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: 12089master
John Crispin
17 years ago
parent
e4a0bfec3c
commit
21bbdc24c3
@ -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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@ -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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@ -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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@ -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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@ -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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@ -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 > $f |
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done |
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|
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$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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$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT |
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|
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$IPTABLES -P OUTPUT $output |
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$IPTABLES -A OUTPUT -m state --state INVALID -j DROP |
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$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT |
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|
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$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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|
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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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|
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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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} |
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|
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fw_forwarding() { |
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local src |
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local dest |
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local masq |
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|
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config_get src $1 src |
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config_get dest $1 dest |
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[ -n "$src" ] && z_src=zone_${src}_forward || z_src=FORWARD |
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[ -n "$dest" ] && z_dest=zone_${dest}_ACCEPT || z_dest=ACCEPT |
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$IPTABLES -I $z_src 1 -j $z_dest |
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} |
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|
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fw_redirect() { |
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local src |
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local src_ip |
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local src_port |
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local src_dport |
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local src_mac |
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local dest_ip |
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local dest_port |
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local protocol |
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|
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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_port $1 src_port |
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config_get src_dport $1 src_dport |
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config_get src_mac $1 src_mac |
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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 protocol $1 protocol |
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[ -z "$src" -o -z "$dest_ip" ] && { \ |
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echo "redirect needs src and dest_ip"; return ; } |
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$IPTABLES -A zone_${src}_prerouting -t nat \ |
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${protocol:+-p $protocol} \ |
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${src_ip:+-s $srcdip} \ |
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${src_port:+--sport $src_port} \ |
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${src_dport:+--dport $src_dport} \ |
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${src_mac:+-m mac --mac-source $src_mac} \ |
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-j DNAT --to-destination $dest_ip${dest_port:+:$dest_port} |
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$IPTABLES -I zone_${src}_forward 1 \ |
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${protocol:+-p $protocol} \ |
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-d $dest_ip \ |
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${src_ip:+-s $srcdip} \ |
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${src_port:+--sport $src_port} \ |
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${dest_port:+--dport $dest_port} \ |
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${src_mac:+-m mac --mac-source $src_mac} \ |
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-j ACCEPT |
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} |
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|
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fw_include() { |
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local path |
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config_get path $1 path |
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[ -e $path ] && . $path |
||||
} |
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|
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fw_addif() { |
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local up |
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local ifname |
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config_get up $1 up |
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config_get ifname $1 ifname |
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[ -n "$up" ] || return 0 |
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(ACTION="ifup" INTERFACE="$1" . /etc/hotplug.d/iface/20-firewall) |
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} |
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|
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fw_init() { |
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echo "Loading defaults" |
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config_foreach fw_defaults defaults |
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echo "Loading zones" |
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config_foreach fw_zone zone |
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echo "Loading interfaces" |
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config_foreach create_network_zone interface |
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echo "Loading rules" |
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config_foreach fw_rule rule |
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echo "Loading forwarding" |
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config_foreach fw_forwarding forwarding |
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echo "Loading redirects" |
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config_foreach fw_redirect redirect |
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echo "Loading includes" |
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config_foreach fw_include include |
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|
||||
uci_set_state firewall core "" firewall_state |
||||
uci_set_state firewall core loaded 1 |
||||
unset CONFIG_APPEND |
||||
config_load network |
||||
config_foreach fw_addif interface |
||||
} |
||||
|
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fw_stop() { |
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$IPTABLES -F |
||||
$IPTABLES -t nat -F |
||||
$IPTABLES -t mangle -F |
||||
$IPTABLES -X -t nat |
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$IPTABLES -X |
||||
$IPTABLES -P INPUT ACCEPT |
||||
$IPTABLES -P OUTPUT ACCEPT |
||||
$IPTABLES -P FORWARD ACCEPT |
||||
} |
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