Split tunneling

With split tunneling only the applications you choose go through the VPN; the rest of the computer stays on its own network.

Adding an application

The Applications: split tunneling card on the VPN page offers three ways:

Choose an application: the list of installed applications; running ones are at the top and marked.
Choose a program file: point to the file to run.
Type a command: for example psql -h db.internal.

Launch next to an application in the list opens it so that it goes through the VPN. If the VPN is down, it connects first.

quickssh run acme -- curl -s http://intranet.acme.local/
quickssh run acme -- google-chrome

Application	Method
Chrome, Edge, Brave and other Chromium-based browsers	The browser's own proxy setting, in a separate profile
Firefox and its derivatives	The browser's own proxy setting, in a separate profile
Other programs	Proxy environment variables (`ALL_PROXY`, `HTTPS_PROXY`…), if the program honors them
Other programs, with `proxychains4` installed (Linux)	All TCP connections go through the proxy

A window that is already running can't be moved into the VPN afterwards. A new instance of the application that goes through the VPN is opened.
Programs that ignore the proxy variables don't go through the VPN. On Linux, installing proxychains4 solves most of them.
The application list is stored on the computer you are using; program paths are specific to the machine.