How to check TCP/IP port availability using C# (Socket Communication)

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Hi everyone,
I have created a application for transferring files using TCP/IP socket communication.Now i want to add a feature that checks TCP/IP coonection to remote server on specific port number(whether its available or not for transfer).So,Kindly any one help me in this.Thanks in advance.

Posted 16-Jun-14 23:29pm

JitendraVerma

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Herman<T>.Instance 17-Jun-14 5:47am

read about TcpClient

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Kareem Abou Saad · Answer 1 · 2014-06-17T02:12:00

Solution 1

There are several ways, one of them is pinging an address every few minutes to insure the network is still up.
You can also use GetIsNetworkAvailable method in System.Net.NetworkInformation.NetworkInterface.
Even a better solution which you can use if the NetworkChange class and its 2 events:
NetworkAvailabilityChanged
NetworkAddressChanged

More info fro MSDN here[^]

Posted 17-Jun-14 2:12am

Kareem Abou Saad

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johannesnestler 17-Jun-14 9:30am

good tip, but has nothing todo with op's problem - he asks for checking PORTS.. - But I didn't vote...

Sprint89 17-Jun-14 10:15am

I don't think you can ping a port