$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 -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
+ [ "$6" == "1" ] && $IPTABLES -t nat -A POSTROUTING -j zone_$1_nat
}
addif() {
+ local dev
+ config_get dev core $2
+ [ -n "$dev" -a "$dev" != "$1" ] && delif "$dev" "$2"
+ [ -n "$dev" -a "$dev" == "$1" ] && return
logger "adding $1 to firewall zone $2"
- $IPTABLES -A INPUT -i $1 -j 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_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_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
+ $IPTABLES -A forward -i $1 -j zone_$2_forward
+ uci_set_state firewall core "$2" "$1"
}
delif() {
logger "removing $1 from firewall zone $2"
- $IPTABLES -D INPUT -i $1 -j 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_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_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
+ $IPTABLES -D forward -i $1 -j zone_$2_forward
+ uci_revert_state firewall core "$2"
}
load_synflood() {
+ local rate=${1:-25}
+ local burst=${2:-50}
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
+ $IPTABLES -N syn_flood
+ $IPTABLES -A syn_flood -p tcp --syn -m limit --limit $rate/second --limit-burst $burst -j RETURN
+ $IPTABLES -A syn_flood -j DROP
+ $IPTABLES -A INPUT -p tcp --syn -j syn_flood
+}
+
+fw_set_chain_policy() {
+ local chain=$1
+ local target=$2
+ [ "$target" == "REJECT" ] && {
+ $IPTABLES -A $chain -j reject
+ target=DROP
+ }
+ $IPTABLES -P $chain $target
}
fw_defaults() {
do
echo 0 > $f
done
+
+ uci_revert_state firewall core
+ uci_set_state firewall core "" firewall_state
+
+ $IPTABLES -P INPUT DROP
+ $IPTABLES -P OUTPUT DROP
+ $IPTABLES -P FORWARD DROP
$IPTABLES -F
- $IPTABLES -t nat -F
$IPTABLES -t mangle -F
- $IPTABLES -X -t nat
+ $IPTABLES -t nat -F
+ $IPTABLES -t mangle -X
+ $IPTABLES -t nat -X
$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
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
+
+ $IPTABLES -N input
+ $IPTABLES -N output
+ $IPTABLES -N forward
+
+ $IPTABLES -A INPUT -j input
+ $IPTABLES -A OUTPUT -j output
+ $IPTABLES -A FORWARD -j forward
+
+ $IPTABLES -N reject
+ $IPTABLES -A reject -p tcp -j REJECT --reject-with tcp-reset
+ $IPTABLES -A reject -j REJECT --reject-with icmp-port-unreachable
}
fw_zone() {
config_get ruleset $1 ruleset
[ -z "$target" ] && target=DROP
- [ -n "$src" ] && ZONE=zone_$src || ZONE=INPUT
+ [ -n "$src" ] && ZONE=zone_$src || ZONE=input
[ -n "$dest" ] && TARGET=zone_${dest}_$target || TARGET=$target
- [ -n "$dest_port" -a -z "$proto" ] && { \
- echo "dport may only be used it proto is defined"; return; }
- [ -n "$src_port" -a -z "$proto" ] && { \
- echo "sport may only be used it proto is defined"; return; }
- $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
+ add_rule() {
+ $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 $TARGET
+ }
+ [ "$proto" == "tcpudp" -o -z "$proto" ] && {
+ proto=tcp
+ add_rule
+ proto=udp
+ add_rule
+ return
+ }
+ add_rule
}
fw_forwarding() {
config_get src $1 src
config_get dest $1 dest
- [ -n "$src" ] && z_src=zone_${src}_forward || z_src=FORWARD
+ [ -n "$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
}
local src_dport
local src_mac
local dest_ip
- local dest_port
+ local dest_port dest_port2
local proto
config_get src $1 src
config_get proto $1 proto
[ -z "$src" -o -z "$dest_ip" ] && { \
echo "redirect needs src and dest_ip"; return ; }
- [ -n "$dest_port" -a -z "$proto" ] && { \
- echo "dport may only be used it proto is defined"; return; }
- [ -n "$src_port" -a -z "$proto" ] && { \
- echo "sport may only be used it proto is defined"; return; }
- $IPTABLES -A zone_${src}_prerouting -t nat \
- ${proto:+-p $proto} \
- ${src_ip:+-s $src_ip} \
- ${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 \
- ${proto:+-p $proto} \
- -d $dest_ip \
- ${src_ip:+-s $src_ip} \
- ${src_port:+--sport $src_port} \
- ${dest_port:+--dport $dest_port} \
- ${src_mac:+-m mac --mac-source $src_mac} \
- -j ACCEPT
+
+ src_port_first=${src_port%-*}
+ src_port_last=${src_port#*-}
+ [ "$src_port_first" -ne "$src_port_last" ] && { \
+ src_port="$src_port_first:$src_port_last"; }
+
+ src_dport_first=${src_dport%-*}
+ src_dport_last=${src_dport#*-}
+ [ "$src_dport_first" -ne "$src_dport_last" ] && { \
+ src_dport="$src_dport_first:$src_dport_last"; }
+
+ dest_port2=$dest_port
+ dest_port_first=${dest_port2%-*}
+ dest_port_last=${dest_port2#*-}
+ [ "$dest_port_first" -ne "$dest_port_last" ] && { \
+ dest_port2="$dest_port_first:$dest_port_last"; }
+
+ add_rule() {
+ $IPTABLES -A zone_${src}_prerouting -t nat \
+ ${proto:+-p $proto} \
+ ${src_ip:+-s $src_ip} \
+ ${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 \
+ ${proto:+-p $proto} \
+ -d $dest_ip \
+ ${src_ip:+-s $src_ip} \
+ ${src_port:+--sport $src_port} \
+ ${dest_port2:+--dport $dest_port2} \
+ ${src_mac:+-m mac --mac-source $src_mac} \
+ -j ACCEPT
+ }
+ [ "$proto" == "tcpudp" -o -z "$proto" ] && {
+ proto=tcp
+ add_rule
+ proto=udp
+ add_rule
+ return
+ }
+ add_rule
}
fw_include() {
fw_custom_chains() {
$IPTABLES -N input_rule
$IPTABLES -N output_rule
- $IPTABLES -N forward_rule
+ $IPTABLES -N forwarding_rule
$IPTABLES -N prerouting_rule -t nat
$IPTABLES -N postrouting_rule -t nat
+ $IPTABLES -N input_wan
+ $IPTABLES -N forwarding_wan
+ $IPTABLES -N prerouting_wan -t nat
+
$IPTABLES -A INPUT -j input_rule
$IPTABLES -A OUTPUT -j output_rule
- $IPTABLES -A FORWARD -j forward_rule
+ $IPTABLES -A FORWARD -j forwarding_rule
$IPTABLES -A PREROUTING -t nat -j prerouting_rule
$IPTABLES -A POSTROUTING -t nat -j postrouting_rule
+ $IPTABLES -A zone_wan -j input_wan
+ $IPTABLES -A zone_wan_forward -j forwarding_wan
+ $IPTABLES -A zone_wan_prerouting -t nat -j prerouting_wan
}
fw_init() {
config_foreach fw_forwarding forwarding
echo "Loading redirects"
config_foreach fw_redirect redirect
- echo "Loading includes"
- config_foreach fw_include include
echo "Adding custom chains"
fw_custom_chains
-
- uci_set_state firewall core "" firewall_state
+ echo "Loading includes"
+ config_foreach fw_include include
uci_set_state firewall core loaded 1
unset CONFIG_APPEND
config_load network
config_foreach fw_addif interface
+ fw_set_chain_policy INPUT $input
+ fw_set_chain_policy OUTPUT $output
+ fw_set_chain_policy FORWARD $forward
}
fw_stop() {
$IPTABLES -F
- $IPTABLES -t nat -F
$IPTABLES -t mangle -F
- $IPTABLES -X -t nat
+ $IPTABLES -t nat -F
+ $IPTABLES -t mangle -X
+ $IPTABLES -t nat -X
$IPTABLES -X
$IPTABLES -P INPUT ACCEPT
$IPTABLES -P OUTPUT ACCEPT
$IPTABLES -P FORWARD ACCEPT
+ uci_revert_state firewall core
}
projects / openwrt / svn-archive / archive.git / blobdiff