As a huge fan of simplewall [0] by Henry++ on Windows, I'm looking forward to testing OpenSnitch on Debian, it looks like it could be the former's counterpart.
I had no idea this existed and I’m glad it’s been shared here. I’ve been using Windows Firewall Control [0] and for most things it’s been decent, but it can’t seem to create usable rules for some store apps (Age of Empires IV in particular), and I’d prefer something open source and actively maintained. Definitively going to give this a try.
Glasswire[0] is good too, albeit it's commercial/paid software. It has a good Android app and allows me to block malicious/privacy-invasive outbound connections from various apps.
- [0] https://www.binisoft.org/wfc