ptu

Tunnel all the things!

Portable Tunneling Utility.

ptu is a simple ad-hoc SSH-based TCP port tunneling application. Written in Go. 
It can expose any server in your network, including your localhost, to the Internet.

HOWTO: Installation

HOWTO: Tailoring

Demo pack of binaries with server config already tailored (integrated into executable)

What problems does it solve?

Well, with ptu you can ...

• ... provide remote professionals with temporary access to your infrastructure.
• ... demo your work to customers and your team without deploying it anywhere.

Apart from this, it's just a good tool to open temporary holes in your firewall
without polluting firewall configuration with temporary rules you may forget
to remove after you don't need them.

Also ptu require no installation and no superuser rights, so you can
just grab and use it right away without involving your IT department.

Reinventing the wheel?

ptu concepts look similar to ngrok, though there are some major differences:

• ptu is "serverless", it could use virtually any SSH server as a "backend".
• it's not about just tunneling to locahost, you can tunnel to any server you have access to.
• ptu is Open Source. You can extend and modify it. And for sure, it's backdoor-free.

Usage

ptu -s <ssh_server>[:<ssh_port>] [OPTIONS]

Options

-t <target_host>:<target_port>
A target host:port for connection forwarding. This is usually your company server or your localhost.
By-default <target_host> is localhost and <taget_port> is 22.

-e <expose_port>
What port do we want to expose to the Internet? This should be Integer value inside 1..65535 range.
NB! Using port numbers below 1024 would require root access to SSH server, which is generally bad.
By-default <expose_port> takes random value in 10000..19999 range.

-u <ssh_username>
The username to connect an SSH server. By-default it's your system username.

-p <ssh_password>
Use provided password to login into SSH server.
NB! Using SSH password is possible, but highly undesirable due to security reasons.
By-default superior option, an SSH authentication agent, is used to authenticate SSH.

-c <config_name>
Load settings from ~/.ptu/<config_name>.yaml (see this example).
If you create file ~/.ptu/default.yaml, settings stored there will override program built-in defaults.
Settings passed by command line arguments always take precedence over settings loaded from file.

NB!

• Please see SSH server GatewayPorts option.
• ptu runs on your machine and nowhere else. 

Typical use case

from https://github.com/ivanilves/ptu