nss-packages-breeze303/qca-nss-ecm/files/qca-nss-ecm.firewall

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#!/bin/sh
FW_SCRIPT="/etc/init.d/firewall"
if grep -q "fw3" "$FW_SCRIPT"; then
if ! iptables -nvL | grep -q "Chain RATE-LIMIT"; then
iptables -N RATE-LIMIT
fi
iptables -F RATE-LIMIT
iptables -A RATE-LIMIT --match limit --limit 1000/sec --limit-burst 1000 -j RETURN
iptables -A RATE-LIMIT -j DROP
iptables -I zone_wan_forward 5 --match conntrack --ctstate NEW -j RATE-LIMIT
[ -n "$(command -v ip6tables)" ] && {
if ! ip6tables -nvL | grep -q "Chain RATE-LIMIT"; then
ip6tables -N RATE-LIMIT
fi
ip6tables -F RATE-LIMIT
ip6tables -A RATE-LIMIT --match limit --limit 1000/sec --limit-burst 1000 -j RETURN
ip6tables -A RATE-LIMIT -j DROP
ip6tables -I zone_wan_forward 5 --match conntrack --ctstate NEW -j RATE-LIMIT
}
elif grep -q "fw4" "$FW_SCRIPT"; then
if ! nft list chain inet fw4 RATE-LIMIT > /dev/null 2>&1; then
nft add chain inet fw4 RATE-LIMIT
fi
nft add rule inet fw4 RATE-LIMIT limit rate 1000/second burst 1000 packets counter return
nft add rule inet fw4 RATE-LIMIT counter drop
nft insert rule inet fw4 forward_wan ct state new counter jump RATE-LIMIT
fi