rule 'FORWARD -p IPv4 --ip-protocol udp --ip-destination-port 67 -j OUT_ONLY'
rule 'OUTPUT -p IPv4 --ip-protocol udp --ip-destination-port 67 -j OUT_ONLY'

rule 'FORWARD -p IPv4 --ip-protocol udp --ip-destination-port 68 -j IN_ONLY'
rule 'INPUT -p IPv4 --ip-protocol udp --ip-destination-port 68 -j IN_ONLY'
