Awesome

Turner

A proof of concept for tunnelling HTTP over a permissive/open TURN server. This will connect to the server, setting up any TCP channels required. A local HTTP proxy is created on 8080, which can be used to "tunnel" the traffic to a target host, for example 169.254.169.254, which the TURN server has access to but you might not have direct access to.

More info: https://www.rtcsec.com/2020/04/01-slack-webrtc-turn-compromise/

Install

If using GO Modules:

git clone https://github.com/staaldraad/turner
cd turner
go build

Run

This assumes you already have a TURN server to connect to or are running your own. If you need to run your own checkout: https://github.com/coturn/coturn/wiki/turnserver

./turner -server turn.server:3478

You can also supply the username/password if the server requires these:

./turner -server turn.server:3478 -u username -p password -http

The HTTP proxy listens on 127.0.0.1:8080 by default.

Testing that the proxy works:

# should return your external IP
curl http://ifconf.co/ip 

# should return the IP of the TURN server
curl -x http://localhost:8080 http://ifconf.co/ip 

SOCKS5

There is basic SOCKS5 support built-in. The SOCKS5 server can be toggled on via the -socks5 argument. The proxy listens on port 127.0.0.1:8000 by default.

./turner -server turn.server:3478 -u username -p password -socks5

It is also possible to enable both SOCKS5 and HTTP proxy-ing at the same time. Simply supply both arguments -http and -socks5.

LICENSE

Turner is licensed under a MIT License (https://choosealicense.com/licenses/mit/)