I think that GUIs are a huge pain. I prefer config files. Also, Little Snitch is not portable across platforms. Mac-only.
Most firewalls are set up as whitelists for incoming connections. Similarly, I set up DNS and HTTP "firewalls" as whitelists for outgoing connections. Zonefiles define the RRs that applications are able to query and lists/maps/tables define the hostnames/URLs that are accepted by the proxy.
Most firewalls are set up as whitelists for incoming connections. Similarly, I set up DNS and HTTP "firewalls" as whitelists for outgoing connections. Zonefiles define the RRs that applications are able to query and lists/maps/tables define the hostnames/URLs that are accepted by the proxy.