ipguard listens network for ARP packets. All permitted MAC-IP pairs
listed in 'ethers' file. If it recieves one with MAC-IP pair, which is
not listed in 'ethers' file, it will send ARP reply with configured
fake address. This will prevent not permitted host to work properly in
local ethernet segment.

Author SeaD <sead at deep.perm.ru>
WWW: http://ipguard.deep.perm.ru/