add system image http://dl.ubnt.com/ER-e100-v1.2.0.build4574253.tar
http://community.ubnt.com/t5/EdgeMAX/Edgerouter-lite-firmware-upgrade-failed/td-p/634897
iptables -t mangle -I PREROUTING -i eth0 -m iprange –src-range 192.168.18.2-192.168.18.19 -j MARK –set-mark 8
iptables -t mangle -A PREROUTING -i eth0 -m iprange –dst-range 119.247.224.98 -j MARK –set-mark 8
for i in /proc/sys/net/ipv4/conf/*/rp_filter ; do
echo 0 > $i
done
http://ricotroubleshooting.blogspot.hk/2014/01/how-to-route-only-specific-ports.html