ARP Tools is collection of libnet and libpcap based ARP utilities. It currently contains:
ARP Discover (arpdiscover), an Ethernet scanner based on ARP protocol; ARP Flood (arpflood), an ARP request flooder; ARP Poison (arppoison), for poisoning switches’ MAC address tables. […]
I decided to restrict Internet access from my LAN to known IP/MAC pairs only. Primary to block Internet access from my PS3, virtual machines and computers that do not need it. Simplest way to achieve this on Linux: filter packet coming from LAN interface in FORWARD chain.
On OpenWRT custom firewall rules can […]