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cvpn

A simple vpn written in C

forthebadge

Features:

  • this is a cli vpn like openvpn
  • Runs on TCP. Works pretty much everywhere, including on public WiFi where only TCP/443 is open or reliable.
  • Uses only modern cryptography, with formally verified implementations.
  • Small and constant memory footprint. Doesn't perform any heap memory allocations.
  • Small (~25 KB), with an equally small and readable code base. No external dependencies.
  • Works on Linux, macOS
  • Doesn't leak between reconnects if the network doesn't change. Blocks IPv6 on the client to prevent IPv6 leaks.

Installation:

git clone https://github.com/krishpranav/cvpn
cd cvpn
make
./cvpn
  • Example of using this on a server
sudo ./cvpn server vpnserver.key auto 1956
  • Example of using on the client
sudo ./cvpn client vpn.key 34.216.127.34 1959
  • for disconnection cvpn ctrl-c