Hi, i don’t know if you’ve found a solution yet, but i was struggling with this a few days ago and got great advise from wolfgan in this thread Can't enable arping nor dhcp listening for Network binding
My problem turned out to be due to something else that a reboot solved, but check out xtables-translate for instance. However, i was not able to get the dhcp listening to work via the portforwarding, but hcp’s answer (providing openhab access to bind to lower ports) above solved it. Next thing is to get arping to work 