Is there an interactive firewall on Linux, one that gives popup on anything trying to connect to anything?

Published: 8/01/2020
Is there an interactive firewall on Linux, one that gives popup on anything trying to connect to anything?
Source: UNIX.STACKEXCHANGE.COM

I used ZoneAlarm and a few other programs for a long time on Windows, just because I could control anything from system services to any software connecting to any IP address. I don't find the idea of info about my PC being sent to anyone, unless I explicitly say yes to it, and 99% of the time, I say no. I'm pretty sure it's the same (although less bad) on Linux, unless you use only a couple of

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