centos禁止与开启ping设置

禁止ping：

echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all

允许ping：

echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all

防火墙/etc/sysconfig/iptables添加

/sbin/iptables -I INPUT -p icmp -m icmp --icmp-type echo-request -m state --state NEW -j ACCEPT

/etc/init.d/iptables restart

iptables -L -nv

7 588 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW icmp type 8