You’d need a network level firewall for that - the OS can circumvent any firewall you run on your computer. That would imply that you’re unprotected once you le

You’d need a network level firewall for that - the OS can circumvent any firewall you run on your computer. That would imply that you’re unprotected once you leave your home network. The firewall would also need to inspect all network traffic, including TLS secured connections.