/sbin/sysctl -w net.ipv4.conf.eth0.rp_filter=016:32 /sbin/sysctl -a | grep -i rp_fi | grep -v arp16:37 rp_filter - BOOLEAN 1 - do source validation by reversed path, as specified in RFC1812 Recommended option for single homed hosts and stub network routers. Could cause troubles for complicated ...