http://www.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/w/index.php?title=Dev/Qubes&curid=1376&oldid=83635
Long [ 15 ] : All that settings are in separate file in the VM directory - dom0 /var/lib/qubes/appvms/whonix/firewall.xml. If the VM is running, those settings are converted to iptables syntax and loaded into QubesDB of directly connected ProxyVM.