c# sniffer filter

Hello,

I need to develop a windows service or application that will detect all outgoing network traffic.

for E.g, when user requests a webpage in browser, or wants to connect to FTP server etc.

I need to obtain the server, IP address that the user has requested and my application will then intervene and decide if the request must be allowed or rejected.

Can someone please point me how to approach this problem.

I am not so good at network programming and need some help in this area.

i need to develop in c#.

Thanks

NZ
.

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