redirect all traffic through tinyfecVPN

This tutorial explains how to redirect all traffic through tinyfecVPN, it essentially works for all VPNs.

prepare

clear all you iptables rule on both sides(suggested for first-time use):

https://github.com/wangyu-/tinyfecVPN/wiki/how-to-fully-clear-iptables

run at server side:

#enable ip forward:
echo 1 >/proc/sys/net/ipv4/ip_forward

#setup SNAT rule:
iptables -t nat -A POSTROUTING -s 10.222.0.0/16 ! -d 10.222.0.0/16 -j MASQUERADE

#run tinyfecVPN server
./tinyvpn_amd64 -s -l 0.0.0.0:8855 --sub-net 10.222.2.0 --tun-dev tun100 --report 10 -k 1234

run at client side:

#run tinyFecVPN client
./tinyvpn_x86 -c -r 44.55.66.77:8855 --sub-net 10.222.2.0 --tun-dev tun100 --keep-reconnect  --report 10 -k 1234

#add route rules
ip route add 44.55.66.77/32 via 192.168.99.1     #change 44.55.66.77 to your server ip; 192.168.99.1 to your default gateway.
ip route add 0.0.0.0/1 via 10.222.2.1 dev tun100
ip route add 128.0.0.0/1 via 10.222.2.1 dev tun100

note:

You need to compile un-restricted tinyfecVPN server by youself.