- TLS SSL Support... - IPv6 support - UDP support like [redsocks](https://github.com/Intika-Linux-Proxy/Redsocks-2) - Integrate [app-route-jail](https://github.com/Intika-Linux-Firewall/App-Route-Jail) (attention require root or SO_MARK) - Add feature to force ipv4 like [foce-ip-inet](https://github.com/Intika-Linux-Firewall/Force-Inet4-Or-Inet6/blob/master/force-inet4-or-inet6.c) (does not seems to be efficient) - Does non dynamically linked apps auto-close with a proper message ? - Review [socket.h](https://github.com/torvalds/linux/blob/master/include/linux/socket.h) and handle blind spot... check raw support ([detail](https://stackoverflow.com/a/15699517))