/ip firewall filter add chain=forward connection-state=new action=jump jump-target=block-ddos add chain=forward connection-state=new src-address-list=ddoser dst-address-list=ddosed action=drop add chain=block-ddos dst-limit=50,50,src-and-dst-addresses/10s action=return add chain=block-ddos action=add-dst-to-address-list address-list=ddosed address-list-timeout=10m add chain=block-ddos action=add-src-to-address-list address-list=ddoser address-list-timeout=10m
原文：http://www.cnblogs.com/wordgao/p/4423711.html