I have helped a lot of Sauce Labs users, and one of the common challenges is setting up a Sauce Connect tunnel in order to test against your internal environment.

The first thing you need to do is download and install the tunnel. It is a standalone command line executable available for Windows, Mac, and Linux. I recommend using Linux.

You can download Sauce Connect at:

https://wiki.saucelabs.com/display/DOCS/Downloading+Sauce+Connect+Proxy

Once downloaded, you need to extract the package to get the ‘sc’ binary from the /bin directory.

wget https://saucelabs.com/downloads/sc-4.5.4-linux.tar.gz
tar -xvzf sc-4.5.4-linux.tar.gz  
cd sc-4.5.4-linux/bin

To start the tunnel, simply pass your Sauce Labs username and access key from the command line or set the SAUCE_USERNAME and SAUCE_ACCESS_KEY environment variables:

sc -u $SAUCE_USERNAME -k $SAUCE_ACCESS_KEY -i $TUNNEL_IDENTIFIER

There are quite a few other options that can be passed, and I won’t talk about them here, but you can see them by typing sc --help at the command line or by reading the documentation here:

https://wiki.saucelabs.com/display/DOCS/Sauce+Connect+Command+Line+Reference

In order to start a tunnel for the Sauce Labs mobile real device cloud, you need to pass 1 additional parameter to point the the mobile datacenter.  You also need to specify a different API KEY (see screenshot below). 

So your command should look something like this:

sc -x https://us1.api.testobject.com/sc/rest/v1 -u $SAUCELABS_USERNAME -k $SAUCECONNECT_API_KEY -i $TUNNEL_IDENTIFIER

See also the sample script sauce-connect.sh that includes additional parameters for setting different port number, log file, etc. (which will conflict if you run on the same host as another tunnel.

	PORT=${1:-4447}
	echo $TESTOBJECT_USERNAME
	echo $SAUCECONNECT_API_KEY
	sc -u $TESTOBJECT_USERNAME -k $SAUCECONNECT_API_KEY \
	-x https://us1.api.testobject.com/sc/rest/v1 \
	-B all \
	-i my_rdc_tunnel \
	–se-port $PORT \
	–logfile /tmp/sc.$PORT.log \
	–pidfile /tmp/sc.$PORT.pid \
	–metrics-address=127.0.0.1:1$PORT

view raw sauce-connect.sh hosted with ❤ by GitHub

Here is the full documentation for real device tunnels:

https://wiki.saucelabs.com/display/DOCS/Sauce+Connect+Proxy+and+Real+Device+Testing