diff options
Diffstat (limited to 'package/firewall/files')
| -rw-r--r-- | package/firewall/files/new/20-firewall | 41 | ||||
| -rwxr-xr-x | package/firewall/files/new/firewall.config | 80 | ||||
| -rwxr-xr-x | package/firewall/files/new/firewall.init | 14 | ||||
| -rwxr-xr-x | package/firewall/files/new/uci_firewall.sh | 291 | ||||
| -rw-r--r-- | package/firewall/files/old/firewall.awk | 50 | ||||
| -rw-r--r-- | package/firewall/files/old/firewall.config | 48 | ||||
| -rwxr-xr-x | package/firewall/files/old/firewall.init | 142 | ||||
| -rw-r--r-- | package/firewall/files/old/firewall.user | 30 |
8 files changed, 696 insertions, 0 deletions
diff --git a/package/firewall/files/new/20-firewall b/package/firewall/files/new/20-firewall new file mode 100644 index 000000000..a8ce17c97 --- /dev/null +++ b/package/firewall/files/new/20-firewall @@ -0,0 +1,41 @@ +. /lib/firewall/uci_firewall.sh +unset ZONE +config_get ifname $INTERFACE ifname +INTERFACE=$ifname +[ "$INTERFACE" == "lo" ] && exit 0 +load_zones() { + local name + local network + config_get name $1 name + config_get network $1 network + [ -z "$network" ] && return + for n in $network; do + local ifname + config_get ifname $n ifname + list_contains ifname $INTERFACE && { + list_contains ZONE $name || ZONE="$ZONE $name" + } + done +} + +config_foreach load_zones zone + +IFACE=$(find_config $INTERFACE) +[ -n "$IFACE" ] && + list_contains ZONE $IFACE || ZONE="$ZONE $IFACE" + +[ ifup = "$ACTION" ] && { + for z in $ZONE; do + local loaded + config_get loaded core loaded + [ -n "$loaded" ] && addif $INTERFACE $z + done +} + +[ ifdown = "$ACTION" ] && { + for z in $ZONE; do + local up + config_get up $z up + [ "$up" == "1" ] && delif $INTERFACE $z + done +} diff --git a/package/firewall/files/new/firewall.config b/package/firewall/files/new/firewall.config new file mode 100755 index 000000000..073169013 --- /dev/null +++ b/package/firewall/files/new/firewall.config @@ -0,0 +1,80 @@ +config defaults + option syn_flood 1 + option input DROP + option output ACCEPT + option forward DROP + +config zone + option name lan + option input ACCEPT + option output ACCEPT + option forward DROP + +config zone + option name wan + option input DROP + option output ACCEPT + option forward DROP + option masq 1 + +config forwarding + option src lan + option dest wan + + +### 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 protocol tcp + +# include a file with users custom iptables rules +#config include +# option path /etc/firewall.user + + +### 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 diff --git a/package/firewall/files/new/firewall.init b/package/firewall/files/new/firewall.init new file mode 100755 index 000000000..26855f39a --- /dev/null +++ b/package/firewall/files/new/firewall.init @@ -0,0 +1,14 @@ +#!/bin/sh /etc/rc.common +# Copyright (C) 2008 OpenWrt.org + +START=45 + +start() { + . /lib/firewall/uci_firewall.sh + fw_init +} + +stop() { + . /lib/firewall/uci_firewall.sh + fw_stop +} diff --git a/package/firewall/files/new/uci_firewall.sh b/package/firewall/files/new/uci_firewall.sh new file mode 100755 index 000000000..dcb9c100b --- /dev/null +++ b/package/firewall/files/new/uci_firewall.sh @@ -0,0 +1,291 @@ +#!/bin/sh +# Copyright (C) 2008 John Crispin <blogic@openwrt.org> + +. /etc/functions.sh + +IPTABLES="echo iptables" +IPTABLES=iptables + +config_clear +include /lib/network +scan_interfaces + +CONFIG_APPEND=1 +config_load firewall + +config fw_zones +ZONE_LIST=$CONFIG_SECTION + +DEF_INPUT=DROP +DEF_OUTPUT=DROP +DEF_FORWARD=DROP + +load_policy() { + config_get input $1 input + config_get output $1 output + config_get forward $1 forward + + [ -z "$input" ] && input=$DEF_INPUT + [ -z "$output" ] && output=$DEF_OUTPUT + [ -z "$forward" ] && forward=$DEF_FORWARD +} + +create_zone() { + local exists + + [ "$1" == "loopback" ] && return + + config_get exists $ZONE_LIST $1 + [ -n "$exists" ] && return + config_set $ZONE_LIST $1 1 + + $IPTABLES -N zone_$1 + $IPTABLES -N zone_$1_ACCEPT + $IPTABLES -N zone_$1_DROP + $IPTABLES -N zone_$1_REJECT + $IPTABLES -N zone_$1_forward + $IPTABLES -A zone_$1_forward -j zone_$1_$5 + $IPTABLES -A zone_$1 -j zone_$1_$3 + $IPTABLES -A OUTPUT -j zone_$1_$4 + $IPTABLES -N zone_$1_nat -t nat + $IPTABLES -N zone_$1_prerouting -t nat + [ "$6" == "1" ] && $IPTABLES -t nat -A POSTROUTING -j zone_$2_nat +} + +addif() { + logger "adding $1 to firewall zone $2" + $IPTABLES -A INPUT -i $1 -j zone_$2 + $IPTABLES -I zone_$2_ACCEPT 1 -o $1 -j ACCEPT + $IPTABLES -I zone_$2_DROP 1 -o $1 -j DROP + $IPTABLES -I zone_$2_REJECT 1 -o $1 -j REJECT + $IPTABLES -I zone_$2_ACCEPT 1 -i $1 -j ACCEPT + $IPTABLES -I zone_$2_DROP 1 -i $1 -j DROP + $IPTABLES -I zone_$2_REJECT 1 -i $1 -j REJECT + $IPTABLES -I zone_$2_nat 1 -t nat -o $1 -j MASQUERADE + $IPTABLES -I PREROUTING 1 -t nat -i $1 -j zone_$2_prerouting + $IPTABLES -A FORWARD -i $1 -j zone_$2_forward +} + +delif() { + logger "removing $1 from firewall zone $2" + $IPTABLES -D INPUT -i $1 -j zone_$2 + $IPTABLES -D zone_$2_ACCEPT -o $1 -j ACCEPT + $IPTABLES -D zone_$2_DROP -o $1 -j DROP + $IPTABLES -D zone_$2_REJECT -o $1 -j REJECT + $IPTABLES -D zone_$2_ACCEPT -i $1 -j ACCEPT + $IPTABLES -D zone_$2_DROP -i $1 -j DROP + $IPTABLES -D zone_$2_REJECT -i $1 -j REJECT + $IPTABLES -D zone_$2_nat -t nat -o $1 -j MASQUERADE + $IPTABLES -D PREROUTING -t nat -i $1 -j zone_$2_prerouting + $IPTABLES -D FORWARD -i $1 -j zone_$2_forward +} + +load_synflood() { + echo "Loading synflood protection" + $IPTABLES -N SYN_FLOOD + $IPTABLES -A SYN_FLOOD -p tcp --syn -m limit --limit ${1}/second --limit-burst $2 -j RETURN + $IPTABLES -A SYN_FLOOD -p ! tcp -j RETURN + $IPTABLES -A SYN_FLOOD -p tcp ! --syn -j RETURN + $IPTABLES -A SYN_FLOOD -j LOG --log-prefix "syn_flood: " + $IPTABLES -A SYN_FLOOD -j DROP + $IPTABLES -A INPUT -p tcp --syn -j SYN_FLOOD +} + +create_network_zone() { + create_zone "$1" "$1" +} + +fw_defaults() { + load_policy $1 + DEF_INPUT=$input + DEF_OUTPUT=$output + DEF_FORWARD=$forward + + echo 1 > /proc/sys/net/ipv4/tcp_syncookies + for f in /proc/sys/net/ipv4/conf/*/accept_redirects + do + echo 0 > $f + done + for f in /proc/sys/net/ipv4/conf/*/accept_source_route + do + echo 0 > $f + done + + $IPTABLES -F + $IPTABLES -t nat -F + $IPTABLES -t mangle -F + $IPTABLES -X -t nat + $IPTABLES -X + + $IPTABLES -P INPUT $input + $IPTABLES -A INPUT -m state --state INVALID -j DROP + $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT + + $IPTABLES -P OUTPUT $output + $IPTABLES -A OUTPUT -m state --state INVALID -j DROP + $IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT + + $IPTABLES -P FORWARD $forward + $IPTABLES -A FORWARD -m state --state INVALID -j DROP + $IPTABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu + $IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + + $IPTABLES -A INPUT -i lo -j ACCEPT + $IPTABLES -A OUTPUT -o lo -j ACCEPT + + config_get syn_flood $1 syn_flood + config_get syn_rate $1 syn_rate + config_get syn_burst $1 syn_burst + + [ -z "$syn_rate" ] && syn_rate=25 + [ -z "$syn_burst" ] && syn_burst=50 + [ "$syn_flood" == "1" ] && load_synflood $syn_rate $syn_burst +} + +fw_zone() { + local name + local network + local masq + + config_get name $1 name + config_get network $1 network + config_get masq $1 masq + load_policy $1 + + [ -z "$network" ] && network=$name + create_zone "$name" "$network" "$input" "$output" "$forward" "$masq" +} + +fw_rule() { + local src + local src_ip + local src_mac + local src_port + local src_mac + local dest + local dest_ip + local dest_port + local proto + local target + + config_get src $1 src + config_get src_ip $1 src_ip + config_get src_mac $1 src_mac + config_get src_port $1 src_port + config_get dest $1 dest + config_get dest_ip $1 dest_ip + config_get dest_port $1 dest_port + config_get proto $1 proto + config_get target $1 target + config_get ruleset $1 ruleset + + [ -z "$target" ] && target=DROP + [ -n "$src" ] && ZONE=zone_$src || ZONE=INPUT + [ -n "$dest" ] && TARGET=zone_${dest}_$target || TARGET=$target + $IPTABLES -I $ZONE 1 \ + ${proto:+-p $proto} \ + ${src_ip:+-s $src_ip} \ + ${src_port:+--sport $src_port} \ + ${src_mac:+-m mac --mac-source $src_mac} \ + ${dest_ip:+-d $dest_ip} \ + ${dest_port:+--dport $dest_port} \ + -j $TARGET +} + +fw_forwarding() { + local src + 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 + local src_ip + 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 + config_get protocol $1 protocol + [ -z "$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 +} diff --git a/package/firewall/files/old/firewall.awk b/package/firewall/files/old/firewall.awk new file mode 100644 index 000000000..31dbae0f3 --- /dev/null +++ b/package/firewall/files/old/firewall.awk @@ -0,0 +1,50 @@ +# Copyright (C) 2006 OpenWrt.org + +BEGIN { + FS=":" +} + +($1 == "accept") || ($1 == "drop") || ($1 == "forward") { + delete _opt + str2data($2) + if ((_l["proto"] == "") && (_l["sport"] _l["dport"] != "")) { + _opt[0] = " -p tcp" + _opt[1] = " -p udp" + } else { + _opt[0] = "" + } +} + +($1 == "accept") { + target = " -j ACCEPT" + for (o in _opt) { + print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) target + print "iptables -A input_wan " _opt[o] str2ipt($2) target + print "" + } +} + +($1 == "drop") { + for (o in _opt) { + print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) " -j DROP" + print "" + } +} + +($1 == "forward") { + target = " -j DNAT --to " $3 + fwopts = "" + if ($4 != "") { + if ((_l["proto"] == "tcp") || (_l["proto"] == "udp") || (_l["proto"] == "")) { + if (_l["proto"] != "") fwopts = " -p " _l["proto"] + fwopts = fwopts " --dport " $4 + target = target ":" $4 + } + else fwopts = "" + } + for (o in _opt) { + print "iptables -t nat -A prerouting_wan" _opt[o] str2ipt($2) target + print "iptables -A forwarding_wan " _opt[o] " -d " $3 fwopts " -j ACCEPT" + print "" + } +} diff --git a/package/firewall/files/old/firewall.config b/package/firewall/files/old/firewall.config new file mode 100644 index 000000000..1b92954c9 --- /dev/null +++ b/package/firewall/files/old/firewall.config @@ -0,0 +1,48 @@ +# Copyright (C) 2006 OpenWrt.org + +# RULE SYNTAX: +# +# forward:<match>:<target>[:<port>] +# - forwards all packets matched by <match> to <target>, +# optionally changing the port to <port> +# +# accept:<match> +# - accepts all traffic matched by <match> +# +# drop:<match> +# - drops all traffic matched by <match> +# +# +# MATCHING OPTIONS: +# +# src=<ip> +# - match the source ip <ip> +# +# dest=<ip> +# - match the destination ip <ip> +# +# proto=<proto> +# - match the protocol by name or number +# +# sport=<port(s)> +# - match the source port(s), see below for syntax +# +# dport=<port(s)> +# - match the destination port(s), see below for syntax +# +# +# +# PORT SYNTAX: +# +# You can enter an arbitrary list of ports and port ranges in the following format: +# - 22,53,993,1000-1024 +# +# If you don't set the protocol to tcp or udp, it will apply to both +# +# +# +# EXAMPLES: +# +# drop:dport=22 src=1.3.3.7 +# accept:proto=tcp dport=22 +# forward:dport=60168:192.168.1.2:60169 diff --git a/package/firewall/files/old/firewall.init b/package/firewall/files/old/firewall.init new file mode 100755 index 000000000..0da97f836 --- /dev/null +++ b/package/firewall/files/old/firewall.init @@ -0,0 +1,142 @@ +#!/bin/sh /etc/rc.common +# Copyright (C) 2006 OpenWrt.org + +## Please make changes in /etc/firewall.user +START=45 +start() { + include /lib/network + scan_interfaces + + config_get WAN wan ifname + config_get WANDEV wan device + config_get LAN lan ifname + config_get_bool NAT_LAN lan nat 1 + if [ $NAT_LAN -ne 0 ] + then + config_get LAN_MASK lan netmask + config_get LAN_IP lan ipaddr + LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2) + fi + + ## CLEAR TABLES + for T in filter nat; do + iptables -t $T -F + iptables -t $T -X + done + + iptables -N input_rule + iptables -N input_wan + iptables -N output_rule + iptables -N forwarding_rule + iptables -N forwarding_wan + + iptables -t nat -N NEW + iptables -t nat -N prerouting_rule + iptables -t nat -N prerouting_wan + iptables -t nat -N postrouting_rule + + iptables -N LAN_ACCEPT + [ -z "$WAN" ] || iptables -A LAN_ACCEPT -i "$WAN" -j RETURN + [ -z "$WANDEV" -o "$WANDEV" = "$WAN" ] || iptables -A LAN_ACCEPT -i "$WANDEV" -j RETURN + iptables -A LAN_ACCEPT -j ACCEPT + + ### INPUT + ### (connections with the router as destination) + + # base case + iptables -P INPUT DROP + iptables -A INPUT -m state --state INVALID -j DROP + iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT + iptables -A INPUT -p tcp --tcp-flags SYN SYN --tcp-option \! 2 -j DROP + + # + # insert accept rule or to jump to new accept-check table here + # + iptables -A INPUT -j input_rule + [ -z "$WAN" ] || iptables -A INPUT -i $WAN -j input_wan + + # allow + iptables -A INPUT -j LAN_ACCEPT # allow from lan/wifi interfaces + iptables -A INPUT -p icmp -j ACCEPT # allow ICMP + iptables -A INPUT -p gre -j ACCEPT # allow GRE + + # reject (what to do with anything not allowed earlier) + iptables -A INPUT -p tcp -j REJECT --reject-with tcp-reset + iptables -A INPUT -j REJECT --reject-with icmp-port-unreachable + + ### OUTPUT + ### (connections with the router as source) + + # base case + iptables -P OUTPUT DROP + iptables -A OUTPUT -m state --state INVALID -j DROP + iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT + + # + # insert accept rule or to jump to new accept-check table here + # + iptables -A OUTPUT -j output_rule + + # allow + iptables -A OUTPUT -j ACCEPT #allow everything out + + # reject (what to do with anything not allowed earlier) + iptables -A OUTPUT -p tcp -j REJECT --reject-with tcp-reset + iptables -A OUTPUT -j REJECT --reject-with icmp-port-unreachable + + ### FORWARDING + ### (connections routed through the router) + + # base case + iptables -P FORWARD DROP + iptables -A FORWARD -m state --state INVALID -j DROP + iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu + iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + + # + # insert accept rule or to jump to new accept-check table here + # + iptables -A FORWARD -j forwarding_rule + [ -z "$WAN" ] || iptables -A FORWARD -i $WAN -j forwarding_wan + + # allow + iptables -A FORWARD -i $LAN -o $LAN -j ACCEPT + [ -z "$WAN" ] || iptables -A FORWARD -i $LAN -o $WAN -j ACCEPT + + # reject (what to do with anything not allowed earlier) + # uses the default -P DROP + + ### MASQ + iptables -t nat -A PREROUTING -m state --state NEW -p tcp -j NEW + iptables -t nat -A PREROUTING -j prerouting_rule + [ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan + iptables -t nat -A POSTROUTING -j postrouting_rule + ### Only LAN, unless told not to + if [ $NAT_LAN -ne 0 ] + then + [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE + fi + + iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \ + iptables -t nat -A NEW -j DROP + + ## USER RULES + [ -f /etc/firewall.user ] && . /etc/firewall.user + [ -n "$WAN" -a -e /etc/firewall.config ] && { + export WAN + awk -f /usr/lib/common.awk -f /usr/lib/firewall.awk /etc/firewall.config | ash + } +} + +stop() { + iptables -P INPUT ACCEPT + iptables -P OUTPUT ACCEPT + iptables -P FORWARD ACCEPT + iptables -F + iptables -X + iptables -t nat -P PREROUTING ACCEPT + iptables -t nat -P POSTROUTING ACCEPT + iptables -t nat -P OUTPUT ACCEPT + iptables -t nat -F + iptables -t nat -X +} diff --git a/package/firewall/files/old/firewall.user b/package/firewall/files/old/firewall.user new file mode 100644 index 000000000..f4eb18ef7 --- /dev/null +++ b/package/firewall/files/old/firewall.user @@ -0,0 +1,30 @@ +#!/bin/sh +# Copyright (C) 2006 OpenWrt.org + +iptables -F input_rule +iptables -F output_rule +iptables -F forwarding_rule +iptables -t nat -F prerouting_rule +iptables -t nat -F postrouting_rule + +# The following chains are for traffic directed at the IP of the +# WAN interface + +iptables -F input_wan +iptables -F forwarding_wan +iptables -t nat -F prerouting_wan + +### Open port to WAN +## -- This allows port 22 to be answered by (dropbear on) the router +# iptables -t nat -A prerouting_wan -p tcp --dport 22 -j ACCEPT +# iptables -A input_wan -p tcp --dport 22 -j ACCEPT + +### Port forwarding +## -- This forwards port 8080 on the WAN to port 80 on 192.168.1.2 +# iptables -t nat -A prerouting_wan -p tcp --dport 8080 -j DNAT --to 192.168.1.2:80 +# iptables -A forwarding_wan -p tcp --dport 80 -d 192.168.1.2 -j ACCEPT + +### DMZ +## -- Connections to ports not handled above will be forwarded to 192.168.1.2 +# iptables -t nat -A prerouting_wan -j DNAT --to 192.168.1.2 +# iptables -A forwarding_wan -d 192.168.1.2 -j ACCEPT |