Iptables Logging rules on Luci. Is it possible?

Hi there,
I have an iptable rule that looks like:
iptables -A input_wan_rule -p tcp -m tcp -multiport --dport 21,22,80,8080 -j LOG --log-prefix "wan-privileged"

It works flawless from /etc/firewall.user every restart and logs every packet.
Is it possible to migrate such rule to Luci firewall frontend?

Yes. There's a section in Luci called "Firewall - Custom Rules". You can add your rule there.

(The above screenshot is from 21.02-rc3 which I've been using for a while - I can't remember what Luci looks like under 19.07.7)