It looks like I'm out of luck, at least for now, in getting freebsd up and running on a pi3. Which leads to a porting question.
I think I'm right in supposing linux's iptables doesn't have tables in the same sense that *bsd's pf does - a group of addresses used as a unit in a single rule and which can be updated on the fly.
So given structures in pf.conf like
table persist file "/etc/firewall/spammers" block in log quick from to any
can anyone suggest the best (or an elegant) way of implementing this sort of functionality on linux please?
TIA.