As complicated as computers are, I think networking is far and away more-so!
As I said, I've worked for several years with both the NAT router and macOS firewall without noticing any slowdowns, but I guess I'll turn off the firewall for at least a while and see if there's anything to be seen.
Thanks for explaining this complicated stuff in comprehensible language.
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
