系统禁止接收ICMP数据包 是什么东东？瑞星防火墙里面的

系统禁止接收ICMP数据包,这样别人就不能通过
ping 命令来测试你的电脑是否在线了
比如你的ip是 192.168.1.2
别人 ping 192.168.1.2
别人如果得到 类似这样的信息

Pinging 192.168.1.2 with 32 bytes of data:

Reply from 192.168.1.2: bytes=32 time<1ms TTL=64

Reply from 192.168.1.2: bytes=32 time<1ms TTL=64

Reply from 192.168.1.2: bytes=32 time<1ms TTL=64

Reply from 192.168.1.2: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.2:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

说明那么别人就知道你的ip可以到达
如果是
Request timed out.

Request timed out.

Request timed out.

Request timed out.
就无法到达,你禁止接收ICMP 就会这样

网络控制消息协议！