this is a first implementation, if you want to see code that look a little bit better check the branch: https://github.com/pariseed/chisel/tree/ntlm-proxy-auth
This fork of chisel implements https proxy connect and ntmlV2 proxy authentication
client --proxy http://NTLMþdomain:user:passwd@IP:PORT --keepalive 1m -v https://server R:9999:localhost:80