miku / uncork

Partial port of corkscrew to Go, tunnel ssh through an http proxy.

uncork

Partial port of corkscrew to Go. A tool for tunneling SSH (or other application layer protocols) through HTTP proxies. This is a usable exercise, but nothing in excess of what nc -X ... could do.

Available where Go is available:

• aix
• android
• darwin
• dragonfly
• freebsd
• illumos
• ios
• js
• linux
• netbsd
• openbsd
• plan9
• solaris
• wasip1
• windows

Installation

$ go install github.com/miku/uncork@latest

Usage

uncork 0.1.0 ([e-mail])
usage: uncork <proxyhost> <proxyport> <desthost> <destport>

Put it in your ssh config:

Host github.com
  User git
  ProxyCommand uncork proxy.mycompany.com 3128 github.com 22

Alternatives

Alternative, via /dev/tcp:

Host github.com
  User git
  ProxyCommand /bin/bash -c 'exec 3<>/dev/tcp/$PROXY_IP/$PROXY_PORT; \
        printf "CONNECT %h:%p HTTP/1.1\n\n" >&3; \
        cat <&3 & : ; exec cat >&3'

Or just netcat:

Host github.com
  User git
  ProxyCommand nc -X connect -x proxy_ip:port %h %p

More at: https://trofi.github.io/posts/295-ssh-over-https.html