I have ubuntu server 16.04 with isc-dhcp-server as authoritative in eth1 (localnet), and some user of my local network has activated another dhcp (rogue) that generates conflictI don't have any Cisco or HP switch with dhcp snooping to block dhcp rogue with rules (like a ip dhcp snooping). And these rules do not work:IPTABLES -I INPUT -i eth1 -p udp --dport 67:68 --sport \ 67:68 -j DROPIPTABLES -A INPUT -i eth1 -p tcp -m multiport --dports 67,68 -j DROPIPTABLES -t mangle -A PREROUTING -p tcp -m multiport --dports 67,68 -j DROPHow to block this dhcp rogue with iptables rules?. Thanks
iptables dhcp snooping
linux;ubuntu;iptables;dhcp