Feature request: choose source interface and upload speed as well

[pvouzis]

It would be great if you added the option to choose the interface (or IP) the test should run on. This is useful when you have a host with multiple interfaces (e.g. one wifi and one wired) and you want to test speed on a specific interface.

This is lest important, but recently fast.com started giving upload speed as well, so it would be great to either make that the default or give the option to the user to choose if they want the upload speed as well.