Firestarter was a package available through Debian that showed active connections (and a few other features which gufw does not have).
You could observe the log of attempts to connect and create rules to either block or allow similar connections by clicking on the log entries.
Is there a way to get this sort of functionality now that Firestarter is not in active development and no longer an available Debian package?
And are there ways to use firestarter with a VPN?