filter broadcast traffic

RouterOS General
1

I’m trying to protect my network from smurf4 attacks

I’d like to filter all broadcast icmp out.

how to do it?

thanks

2

Bridged mode;

/ interface bridge firewall add action=drop mac-protocol=ip protocol=icmp mac-dst-address=ff:ff:ff:ff:ff:ff

Routed mode;

/ ip firewall rule forward add action=drop dst-address=192.168.1.255/32 protcol=icmp