tcpkill
From Initq
tcpkill - kill TCP connections on a LAN
Syntax
tcpkill -i eth0 { expression }
Kill all all packets arriving at or departing from host 192.168.1.2 (host12.nixcraft.com)
tcpkill host 192.168.1.2
tcpkill host host12.nixcraft.com
To kill all IP packets between 192.168.1.2 and any host except 192.168.1.111, type the following:
tcpkill ip host 192.168.1.2 and not 192.168.1.111