如何确定Windows服务器上是否打开了端口? [英] How do I determine if a port is open on a Windows server?

问题描述

我正在尝试将站点安装在服务器上的备用端口下，但是该端口可能已被防火墙关闭.有没有一种方法可以在特定端口上ping出或输入，以查看它是否打开?

I'm trying to install a site under an alternative port on a server, but the port may be closed by a firewall. Is there a way to ping out or in, on a specific port, to see if it is open?

推荐答案

假定您要使用的是TCP(而不是UDP)端口:

Assuming that it's a TCP (rather than UDP) port that you're trying to use:

1. 在服务器本身上，使用netstat -an检查哪些端口正在侦听.

1. On the server itself, use netstat -an to check to see which ports are listening.

从外部，只需使用telnet host port(在Unix系统上为telnet host:port)来查看连接是否被拒绝，接受或超时.

From outside, just use telnet host port (or telnet host:port on Unix systems) to see if the connection is refused, accepted, or timeouts.

在后一个测试中，通常:

On that latter test, then in general:

• 连接被拒绝表示该端口上没有任何运行
• 接受表示该端口上正在运行某些东西
• 超时表示防火墙阻止了访问

• connection refused means that nothing is running on that port
• accepted means that something is running on that port
• timeout means that a firewall is blocking access

在Windows 7或Windows Vista上，默认选项'telnet'不被识别为内部或外部命令，可操作程序或批处理文件.要解决此问题，只需启用它:单击*开始**→. 控制面板→ 程序→ 打开或关闭Windows功能.在列表中，向下滚动并选择 Telnet Client ，然后单击 OK .

On Windows 7 or Windows Vista the default option 'telnet' is not recognized as an internal or external command, operable program or batch file. To solve this, just enable it: Click *Start** → Control Panel → Programs → Turn Windows Features on or off. In the list, scroll down and select Telnet Client and click OK.

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