224.0.0.0/8 is a multicast network, it´s mainly (and the only known to me) use is OSPF, which works with UDP-packets to 224.0.0.5 and .6 hth, &rw Michael Meskes wrote: > > Could anyone please tell me what's so special on this subnet that ipmasq > allows icmp and udp output to it? It's the only hard coded subnet I found in > this package. > > Michael