Fake is a utility that enables the IP address be taken over by bringing up a second interface on the host machine and using gratuitous arp. Designed to switch in backup servers on a LAN.
You can download it from the following link: https://packetstormsecurity.com/files/download/13241/fake-1.0.2.tar.gz
Source: https://packetstormsecurity.com/files/13241/fake-1.0.2.tar.gz.html