什么是端口?

我们平时所说的端口其实不是指物理意义上的端口，而是特指TCP/IP协议中的端口，是逻辑意义上的端口。本地操作系统会给那些有需求的进程分配一个端口。当目的主机接收到数据包后，将根据报文首部的目的端口号，把数据发送到相应端口，然后由占有该端口的进程进行操作。

· ·端口的范围是从0 到65535(2^16-1)

· ·一个端口被占用后不能被其他的进程使用

注意!端口控制一般都在服务器操作系统防火墙中配置，而当你使用的是各大运营商提供的云服务器，极有可能会关闭系统自带的防火墙，此时请使用运营商提供的服务器控制台来开放端口

操作步骤：

1、打开开始-管理工具-高级安全Windows防火墙，进入防火墙设置界面

2、点击【入站规则】右键“新建规则”，进入新建规则向导

3、规则类型选择“端口”，点击下一步

4、协议根据你需要开放的端口来选择，比如咱们开放8080端口，就选择TCP协议，特定本地端口填写要开放的端口，如果是多个端口同时开放，可用,号隔开，填好后下一步

5、操作选择“允许连接”，点击下一步

6、在配置文件这项，勾选“域”、“专用”、“公用”三项，点击下一步

7、填写名称和描述后点击完成，即可

要查看端口是否开放成功，可以用系统功能telnet命令查看，如果是自行设置端口开放失败，可以联系驰网售后为您处理

更多服务器技术干货可以关注【驰网】，助您成为更专业的服务器管理者!

高防护段(TCP_SYN,ACK,RST)展示：

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