请看答案

Type the following command at shell prompt:
# echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all

This instructs the kernel to simply ignore all ping requests (ICMP type 0 messages). To enable ping request type the command:
echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_all

You can add following line to /etc/sysctl.conf file:
# vi /etc/sysctl.conf
Append following line:
net.ipv4.icmp_echo_ignore_all = 1

所有跟帖： 

• 更进一步的答案 -code112- ♂ (160 bytes) () 12/12/2008 postreply 10:49:36

• 有一个iptable script -code112- ♂ (10 bytes) () 12/12/2008 postreply 10:51:39

• It's only disable the ICMP, you can simply do that on your route -daye- ♂ (135 bytes) () 12/12/2008 postreply 11:33:32

• Please see my second reply above -code112- ♂ (0 bytes) () 12/12/2008 postreply 13:40:19