echo 100 facebook >> /etc/iproute2/rt_tables
ip route add default dev tun0 table facebook
ipset create blockedIP iphash -exist ipset add blockedIP 8.8.2.2
iptables -t mangle -I prerouting -m set --match-set blockedIP dst -j Mark --set-mark 998
ip rule add fwmark 998 priority 1999 table facebook