Is there any alternative for netstat command in C#?

Question

I am writing a C# program which tells the Active Connections (Protocal, Local Address , Foreign Address , State , Process Id ) . To do this I am running cmd.exe as a process and passing netstat -ano as an argument.

System.Diagnostics.Process.Start("cmd.exe","netstat -ano");

This returns Active connections . But I don't want to use this netstat command .
Is there any alternative for netstat.exe in C# ?
Any library or something else so that I can get the same output ?

I'll never understand using cmd.exe to launch netstat.exe rather than just launching netstat.exe. — ProgrammingLlama, Sep 02 '21 at 07:44
I am unable to launch netstat.exe directly that is why I am using cmd.exe for that — Akash Kumar, Sep 02 '21 at 07:46
Why are you unable to launch netstat.exe directly? They're both in system32, which is in the PATH variable, so you should be able to launch netstat.exe just as easily as cmd.exe. — ProgrammingLlama, Sep 02 '21 at 07:47
Does this answer your question? [Netstat -ban (or -oan) equivalent in .NET](https://stackoverflow.com/questions/2775648/netstat-ban-or-oan-equivalent-in-net) — Phate01, Sep 02 '21 at 07:50
You'll likely have to find something to [P/Invoke](https://www.pinvoke.net/) — phuzi, Sep 02 '21 at 07:54

score 3 · Answer 1 · answered Sep 02 '21 at 08:04

You do not need to run nmap or netstat, you can get all the info much easier when you take a look at the System.Net.NetworkInformation namespace. There you can find charming things like GetActiveTcpListeners() or GetActiveTcpConnections() and much more.

public static void ShowActiveTcpConnections()
{
           Console.WriteLine("Active TCP Connections");
           IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
           TcpConnectionInformation[] connections = properties.GetActiveTcpConnections();
           foreach (TcpConnectionInformation c in connections)
           {
               Console.WriteLine("{0} <==> {1}",
                   c.LocalEndPoint.ToString(),
                   c.RemoteEndPoint.ToString());
           }
}

Details are here in the docs:

https://learn.microsoft.com/en-us/dotnet/api/system.net.networkinformation.ipglobalproperties.getactivetcpconnections?view=net-5.0

Process id is not being shown there. Is there any way to get the process id also ? By the way thanks for the help. — Akash Kumar, Sep 02 '21 at 08:38

score 1 · Answer 2 · answered Sep 02 '21 at 07:57

1

I was looking for an netstat alternative as you and I found nmap.

To scan I usually run:

nmap -sP 192.168.1.*

answered Sep 02 '21 at 07:57

Giovanni Esposito

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How can I get the process id ? – Akash Kumar Sep 02 '21 at 08:21
1

https://stackoverflow.com/questions/577433/which-pid-listens-on-a-given-port-in-c-sharp – Karlth Sep 28 '22 at 14:53

Is there any alternative for netstat command in C#?

2 Answers2