Yes, I kept the default Asus subnets when configuring, so intranet is .50.0/24, GN 1 is 101.0/24, GN2 is 102.0/24.
Without the rule removed looks like this:
# ebtables -t broute -L BROUTING
Bridge table: broute
Bridge chain: BROUTING, entries: 10, policy: ACCEPT
-p IPv4 -i wl0.1 --ip-dst...