[LUAU] help with iptables

[Vince Hoang]

I tend to not use Linux for dual-homed hosts, but this should be very
doable.

Have you enabled logging to see what rules are matching first? It seems
strange that you want to block internal access to tcp/80, but if this is
true, you can configure the web server to bind to only the external
interface/IP so there is nothing to filter out on the internal interface.

-Vince