[root@linuxzgf ~]# echo 0 >/proc/sys/net/ipv4/icmp_echo_ignore_all
此上两条命令的和允tg下载效果实时生效，查看软硬链接命令
系统环境Centos5
一、系统禁止ping
[root@linuxzgf ~]# echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all
二、和允
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/etc/rc.d/rc.local中增加一行
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
0表示允许
1表示禁止
关键词：linux禁ping,和允linux
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