近期不少站点管理员发现，网站流量出现明显波动，排查后发现一个常被忽视的环节——禁 ping。所谓禁 ping，就是在服务器安全设置中屏蔽了 ICMP 协议，导致搜索引擎的爬虫服务器无法通过 ping ...

ICMP的全名是Internet Control and Message Protocal即因特网控制消息/错误报文协议，这个协议主要是用来进行错误信息和控制信息的 ...

Hey all,<P>I've written some code to ping. I have two versions, one that uses icmp.dll and one that uses raw sockets. Both work just fine.<P>The problem with raw sockets is that it must be run under ...

When we began this series, we discussed the ICMP (Internet Control Message Protocol). This protocol is the basis for two widely used applications, ping and traceroute. In this lesson and the next, we ...

The current IP address scheme of 32-bit words is fast becoming inadequate. It would appear that 2 32 = 4 294 967 296 combinations of addresses should be enough for everybody, but in practice this is ...