On Mon, Nov 29, 2004 at 12:51:22PM +0100, Troels Arvin wrote: > > net.ipv4.icmp_echo_ignore_broadcasts (current: 0, proposed: 1) > > I actually find it useful that ping broadcasts are allowed, to be able to > quickly see which hosts are up. It can get used as a DDoS amplifier however so in general its only safe if it is behind a firewall