Use DNS tunnel to get free internet

0. setup
https://qiuri.org/806.html
https://www.rawidn.com/posts/how-to-use-dns-tunnel.html
when you ready, do this test (put sub.your_domain.com in): http://code.kryo.se/iodine/check-it/

1. in server: 
iodined -f -p 5353 -P password your_local_server_ip(192.168.100.1) sub.your_domain.com
iptables -t nat -A PREROUTING -i eth0 -p udp --dport 53 -j DNAT --to :5353

2. in local: 
sudo iodine -f -P password your_server_ip sub.your_domain.com

3. around
set ssr, enjoy it.