禁止ping

(1) netsh advfirewall firewall add rule name=icmp dir=in protocol=icmpv4 action=allow 允许ping
(2) netsh advfirewall firewall add rule name=icmp dir=in protocol=icmpv4 action=block 禁止ping
netsh advfirewall firewall delete rule name="Allow ICMPv4-In" 也是禁ping