Forgate

まだ試していないのでよくわかってないのですが、説明を読む限りではettercapみたいなものっぽい。あとで試すためのメモ。

Forgate (Forge Gateway) allows you to capture traffic from a third party 
in a switched environment at the expense of a slight increase in latency to 
that third party host. Utilizing ARP cache poisoning, packet capture and 
packet reconstruction techniques, Forgate works with nearly all TCP, ICMP 
and UDP IPv4 traffic flows.