uncork

uncork

SSH-over-HTTPS proxy that works like Unix corkscrew.

Install

Run npm install uncork -g to install uncork globally.

Run

Before running uncork, make sure your proxy is set in environment variable as either HTTPS_PROXY or HTTP_PROXY.

Run uncork 22 ssh.github.com:443 to start uncork server on port 22 and forward to ssh.github.com:443.

SSH-over-HTTPS proxy 1.0.0

- Listening on port 22
- Will connect to HTTPS proxy at 127.0.0.1:8888
- Will tunnel traffic to destination at ssh.github.com:443

If your proxy server requires authentication, you can run uncork 22 ssh.github.com:443 johndoe P@ssw0rd to start uncork server with BASIC authentication.

Options via environment variables

You can also set options thru environment variables listed below.

Environment variable	Description	Default
uncork_destination	Destination hostname and port	ssh.github.com:443
uncork_port	Port number to listen to	22
uncork_proxy_username	Username for proxy BASIC authentication
uncork_proxy_password	Password for proxy BASIC authentication

How we use uncork

At our customer site, their Windows boxes are shared and locked behind firewall with HTTPS proxy. We want to use Git client to read/write to GitHub via SSH. We prefer SSH because we can use deploy keys to limit access to our repositories.

Our requirements:

• Use GitHub deploy keys, which is SSH only
• Work thru their HTTPS proxy
  • Only allow traffic to external servers on port 443
  • Requires authentication, supports both BASIC and NTLM
• Unzip to install
  • Do not require administrative privileges
  • Minimal footprint

Fortunately, GitHub has a SSH server setup on port 443 instead of 22, described in this article.

Assume our repository is setup with SSH deploy generated by puttygen.

On the Windows box:

• Install PuTTY suite, with plink and pageant
• Setup environment variable GIT_SSH and point to plink.exe
  • Run SETX GIT_SSH <path to plink.exe>
• Load the deploy key
  • Run pageant
• Install and run uncork
  • Run npm install uncork -g
  • Run uncork 22 ssh.github.com:443
• Clone the repository
  • Run git clone git@localhost/org/reponame.git

Although some steps mentioned above requires administrative privileges, we actually build a ZIP file to contain all installed components mentioned.

Contribution

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