vpnmanager/device-config/2/etc/firewall.user

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force_dns() {
# lanip=$(ifconfig br-lan |sed -n 's/.*dr:\(.*\) Bc.*/\1/p')
lanip=$(uci get network.lan.ipaddr)
iptables -t nat -A PREROUTING -s 0/0 -p udp --dport 53 -j DNAT --to $lanip
iptables -t nat -A PREROUTING -s 0/0 -p tcp --dport 53 -j DNAT --to $lanip
}
force=$(uci get glconfig.general.force_dns)
if [ -n "$force" ]; then
force_dns
fi