Client-side setup

Hi,
I am trying to setup a proxy client-side to test a mobile application's behavior. The setup would be like this:

mobile ---[wifi]--- AP --- Toxiproxy ---[internet]--- servers

Toxiproxy is on a Windows PC with 2 ethernet cards. I would like to test how the mobile reacts when connectivity is bad; for example, when browsing with HTTP.

I can't seem to find how to create a proxy that catches streams regardless of destination IP. For example, I can set 192.168.1.100:80 to be forwarded to 172.217.13.196:80 (google), but I can't seem to have a request to 172.217.13.196:80 be handled by Toxiproxy and go through to Google.

The latest try I did was this:
toxiproxy-cli create http_out -l :80 -u :80
The toxiproxy server sees the connections, but the mobile gets nothing back and Wireshark gives me the impression that the internet-facing ethernet card is not implicated.

How is this done with the cli interface?

Start by checking the documented toxiproxy-cli create syntax and the proxy listener/upstream behavior described in the issue. Done means determining whether destination-independent client-side forwarding is supported for the stated Windows two-interface setup, or documenting the configuration or limitation found.