Ok, I have a strange one. We are trying to block DHCP return requests from a Mikrotik CPE. It used to work but in recent upgrades, we are showing that the bridge filter is not working. We are using 4.16 currently.
Here are the rules: /interface bridge filter add action=log chain=forward comment="Block DHCP Servers from ETH1" disabled=no in-interface=ether1 ip-protocol=udp log-prefix="DHCP: " mac-protocol=ip packet-type=broadcast src-port=67 add action=drop chain=forward comment="" disabled=no in-interface=ether1 ip-protocol=udp mac-protocol=ip packet-type=broadcast src-port=67 The counters are incrementing for both the LOG and DROP rules, but it is not dropping the packets in the last rule. I have also tried turning on the "Use IP Firewall" option, but still no results. Eric Rogers Precision Data Solutions, LLC (317) 831-3000 x200
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