defined route are discarded and the ICMP message "Host Unreachable" is generated. If "prohibit", packets ... defined route are discarded and the ICMP message "Communication Adminis…ASCII data needed for the IP, ICMP, TCP, and UDP management information basesASCII data needed for the IP, ICMP, TCP, and UDP management information basesenabled, the kernel will send general ICMP queries from a zero source address. This feature