start() {
include /lib/network
scan_interfaces
+ config_load /var/state/network
config_get WAN wan ifname
config_get WANDEV wan device
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
# insert accept rule or to jump to new accept-check table here
#
iptables -A INPUT -j input_rule
+ [ -z "$WAN" ] || iptables -A INPUT -i $WAN -j input_wan
# allow
iptables -A INPUT -j LAN_ACCEPT # allow from lan/wifi interfaces
# insert accept rule or to jump to new accept-check table here
#
iptables -A FORWARD -j forwarding_rule
+ [ -z "$WAN" ] || iptables -A FORWARD -i $WAN -j forwarding_wan
# allow
iptables -A FORWARD -i $LAN -o $LAN -j ACCEPT
# uses the default -P DROP
### MASQ
+ iptables -t nat -A PREROUTING -m state --state NEW -p tcp -j NEW
iptables -t nat -A PREROUTING -j prerouting_rule
+ [ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
iptables -t nat -A POSTROUTING -j postrouting_rule
[ -z "$WAN" ] || iptables -t nat -A POSTROUTING -o $WAN -j MASQUERADE
-
+
+ iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
+ iptables -t nat -A NEW -j DROP
+
## USER RULES
[ -f /etc/firewall.user ] && . /etc/firewall.user
[ -n "$WAN" -a -e /etc/config/firewall ] && {
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
}