Window Service block application or port

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Hello everybody.

I have write Window Service follow at reference : Simple Windows Service Sample[^]

Now , i want to block a application or port on window such as : Block Port 123, Block program notepad.exe . I think it`s write in Service Onstart event

VB

Protected Overrides Sub OnStart(ByVal args() As String)

        'Block Port on Window
         'Block application on window , Example Block notepad.exe
    End Sub

Do you help me about this topic or reference link for me.

Thank you.

Posted 18-Jun-12 7:04am

headshot9x

Updated 18-Jun-12 7:20am

Nelek

v2

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Nelek 18-Jun-12 13:21pm

Edit: clickable link

headshot9x 18-Jun-12 23:43pm

Hi Dave Kreskowiak
I have read your link, as it, in OnStart methos, we do what to do, as in this, of course Notepad window, for example, to find its path, and then lock it
Example Notepad :

Target : %windir%\system32\notepad.exe
Start in : %HOMEDRIVE%%HOMEPATH%


Protected Overrides Sub OnStart(ByVal args() As String)
 
        'Block Port on Window
         ' I dont`t known

         'Block application on window , Example Block notepad.exe
         ' Get GetCommandLineArgs Notepad
          ' Then change Registry of them 
          
    End Sub

If there is something wrong you can tell me
Thank you

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Dave Kreskowiak · Accepted Answer · 2012-06-18T15:21:00

This is called a firewall you're attempting to write. Unless you know the Windows network stack, you'll find this extremely difficult to implement.

For testing, you could pass this information in through the services OnStart method arguments. It works just like you wrote. The arguments would be passed in as a couple of strings in an array.

http://msdn.microsoft.com/en-us/library/system.serviceprocess.servicebase.onstart.aspx[^]

For a production application, a firewall config is usually stored somewhere else, like an encrypted entry in the Registry or a config file.