2.4 kernels require a patch... http://www.linuxvirtualserver.org/~julian/#hidden
> This comes up every year or so on some list or another. > > Linux will send traffic for any of it's addresses through any > interface. > This is allowed in rfc 1122 section 3.3.4.2. You can change > this behavior > by doing this > > echo 1 > /proc/sys/net/ipv4/conf/all/hidden > echo 1 > /proc/sys/net/ipv4/conf/eth0/hidden > echo 1 > /proc/sys/net/ipv4/conf/eth1/hidden > > > We have linux box running kernel 2.4 with 2 NICs.
