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來源: 於 2008-12-12 10:44:46 [舊帖] [給我悄悄話] 本文已被閱讀：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