ICMP and ip prohibit rule



Hi,
According to "man ip" , we can add a prohibit rule like thus:

ip rule add from 192.168.0.10 to 192.168.0.180 prohibit

According to the man page, this should cause an ICMP message
to be sent when trying to conenct from 192.168.0.180 to 192.168.0.10.
Yet when I tried it, and ran "ping 192.168.0.180", the ping answered
and I
did not got any ICMP. Any idea why ?
rgs,
Mark
.