I am running OPNSense 25.1.12
I have 2 firewall rules on the LAN port. They are
Block In from Alias1 to 10.20.0.49 port *
Block Out from 10.20.0.49 to Alias1 port *
I apply the rules
I test doing: nc -zv <dns name in Alias1> 443
These are above the other rules that allow flow of data
and that succeeds. It shouldn't I don't have to reboot do I to have them applied?
Did you also test before you applied the rules? Then you will need to reset the state table. This does not happen automatically, because it would interrupt service in large deployments
Firewall > Diagnostics > States > Actions