C program : How to block a port from accessing

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Hi Team,
In general how to block some one accessing my system. I am looking for something which can be written in C but not through manual operation.

Regards,
Kiran

Posted 25-Apr-11 19:56pm

AshakiranBhatter

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Sergey Alexandrovich Kryukov 26-Apr-11 2:02am

What do you call a "port"? IP port? Serial, parallel?
--SA

[no name] 26-Apr-11 5:04am

My primary query was...how will i know that some one or even some process is accessing my system and how to block or allow that someone.

Joan M 26-Apr-11 11:17am

As SAKryukov says... you must provide more details... we can guess only and guessing is not the way to go in our business... Work it a little bit more and we will help you...

[no name] 27-Apr-11 3:37am

let me explain as below in detail.
I have installed many programs onto my system and every day these programs try to update themselves by accessing the internet.
Problem statement: How do i know even one or all programs on my system is going to access internet. In case if it is trying to access the internet, i want to get notification that this program is accessing the net and ask for my permission to be permitted. Just like an Anti - virus program.
Platform: Windows XP.
Solution: How do i do this through C programming on Windows.

Regsrds,
Kiran

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Stephen Wiria · Answer 1 · 2011-04-26T05:03:00

Solution 2

If you mean intercepting and modifing inbound and outbound Internet traffic then take a look at this: Layered Service Provider[^]
or the new one: Windows Filtering Platform[^]

I even wrote a small article[^] about this back in May 2009.
Translated one[^]

Posted 26-Apr-11 5:03am

Stephen Wiria

Eugen Podsypalnikov · Answer 2 · 2011-04-25T21:06:00

Solution 1

// how to block some one accessing my system...
Do not provide any server, just write nothing :)

Posted 25-Apr-11 21:06pm

Eugen Podsypalnikov