how to close a TCP connection using c#

Question

I want to close an existing TCP connection on a given server. the connection is not control by the C# application, but since I know the source IP and source port, destination IP and destination Port, I would like to terminate this connection using C#.

How can I do that? Thanks

You mean you want to kill connection of another application? — Sriram Sakthivel, May 29 '14 at 09:17
yes.... some times to connection is stuck and I want to monitor and kill it. — user2993562, May 29 '14 at 09:17
You might want to look at: http://stackoverflow.com/questions/1672062/how-to-close-a-tcp-connection-by-port (note: a site-admin converted this from an answer) — Syed Farjad Zia Zaidi, May 29 '14 at 09:23

score 1 · Answer 1 · answered May 29 '14 at 09:21

1

You can form a TCP reset packet, but it's a complex solution.

answered May 29 '14 at 09:21

DarkWanderer

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score 1 · Answer 2 · answered May 29 '14 at 09:23

1

If you have an API that gives you access to your network card driver (very unlikely) you might.

In general this is not possible in Windows, it is protected by the system: only the process that owns the socket handle can close it.

answered May 29 '14 at 09:23

quantdev

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Not true, [TcpView](http://technet.microsoft.com/en-us/sysinternals/bb897437), [Netlimiter](http://www.netlimiter.com/) can do that AFAIK. – Sriram Sakthivel May 29 '14 at 09:46

how to close a TCP connection using c#

2 Answers2