如何根据 IP 地址范围仅获取 LAN 上的计算机？
我正在编写一个 C# Winforms 程序，以根据给定的 IP 地址范围获取连接到我的 LAN 的所有计算机。
我正在使用 Ping 类来识别计算机。 但这里的问题是我收到来自连接到 LAN 的所有设备（例如打印机、IP 电话等）的响应。
请帮助我过滤这些设备并仅获取来自 LAN 的计算机。
I am writing a C# Winforms program to get all the computers that are connected to my LAN, based on the given IP address range.
I am using the Ping class to identify the computers.
But the problem here is I am getting responses from all the devices like (printer, IP phone, etc) that are connected to LAN.
Please help me in filtering these devices and to get only computers from LAN.
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使用 PING 无法判断网络节点是否为计算机/打印机/IP 电话等。
您需要使用更高级别的协议（如 NETBIOS 或 DNS）来解决此问题，但这在很大程度上取决于设备的实现方式。
It's impossible to tell using PING whether a network node is a computer/printer/ip phone etc.
You would need to use a higher level protocol like NETBIOS or DNS to work this out but it depends very much on how the devices are implemented.
好吧，打印机、电话等设备中可能有通用计算机，运行 TCP/IP 堆栈和一些专用服务器软件，因此归结为您对“计算机”的定义......仍然，这听起来比它的价值更麻烦，除非你能识别出只有你认为的计算机才会有的东西，而且所有的计算机都会有。在 Windows 网络上，也许是 SMB，但这可以捕获通过 SMB 公开存储的 NAS。
我认为没有通用的方法可以做你想做的事情。正如 Lloyd 指出的那样，nmap 会进行一些指纹识别，但这远非完美（它通常会非常接近特定的操作系统版本，但它无法判断运行该操作系统的物理设备类型）。
Well, chances are that the printer, phone, etc. have general purpose computers in them running a TCP/IP stack and some specialized server software, so it boils down to what your definition of what a "computer" is... still, it sounds like more trouble than it's worth, unless you can identify something that only what you think of as computers will have, and that all of them will have. On a Windows network, SMB, perhaps - but that could catch a NAS that exposes storage over SMB.
I don't think there's a general way to do what you want to do. Like Lloyd pointed out, nmap does some fingerprinting, but that is far from perfect (it will usually get pretty close to a specific OS version, but it can't tell what kind of physical device is running that OS).