请看答案

来源: 于 2008-12-12 10:44:46 [旧帖] [给我悄悄话] 本文已被阅读：次

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