在工作中处理服务器故障问题的时候，经常需要检测一下Windows的服务器业务端口是否开放，是否能正常与外面通讯。今天飞飞与大家分享一下如何在windows环境下检测服务器端口是否开放，方法很简单。
1、以Windows 2008系统为例，先检查是否有安装telnet功能，有的服务器默认没有telnet功能，运行-cmd-回车-输入telnet，若是提示不是内部或是外部命令，也不是可运行的程序，即表示没有安装telnet
- 所以我们就需要先安装telnet，控制面板-程序-打开或关闭windows功能
3、进入到服务器管理器，双击“功能”，在右边的摘要可以看到“添加功能”，点击添加
4、在选择功能向导这里，勾选“Telnet服务器”和“Telnet客户端”，勾选后下一步，直至安装完成
- telnet安装好后，再次打开运行-cmd-输入telnet命令：
telnet IP（或是域名） 端口
若是端口未开放，显示如下：无法打开到主机的连接，端口**连接失败
若是输入命令后有反应，跳转到如下这个界面了，说明端口是开放的
现在你知道如何查看端口是否有开放吗？
高防护段（TCP_SYN,ACK,RST）展示：
103.216.155.1
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