wil92/vpn-try

vpn-try

Just a try to make my own vpn, and play around with sockets in c++.

# redirect all traffic to the application
sudo iptables -t nat -A OUTPUT -j REDIRECT -p tcp --to-port 4333 -m owner ! --uid-owner root

# redirect google traffic to the application
sudo iptables -t nat -A OUTPUT -p tcp -d google.com --dport 80 -j REDIRECT --to-port 4333 -m owner ! --uid-owner root 
sudo iptables -t nat -A OUTPUT -p tcp -d google.com --dport 443 -j REDIRECT --to-port 4333 -m owner ! --uid-owner root 

# list iptables rules created
sudo iptables -t nat -L --line-number

# remove a particular iptable rule
sudo iptables -t nat -D OUTPUT <line-num>

# clear iptables
sudo iptables -t nat -F

Communication protocol

Message with network information

s_addr	sin_port	message
32 bit number	16 bit number	base68::encode(message)
6 bytes	3 bytes	tbd

Message without network information

message
base68::encode(message)

ToDo

• Create scripts to handle iptables
  1. Create iptables rules to redirect traffic to the application
  2. Remove previously created iptables rules