how external counter get unique visitors?

Posted by dnkira on Stack Overflow See other posts from Stack Overflow or by dnkira
Published on 2010-04-22T17:07:58Z Indexed on 2010/04/22 18:33 UTC
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hello
how do external counter track unique visitors via image
i'd also like to get Referrer if possible.
something like img="http://www.somecounterdomain.com/count.php?page=83599"
i'm using ASP.NET, c#
i'm aware of a user can "cheat" but would like to make that posibility minimal.
additional difficulty is that i should trach external server and can't implement c# code there.
what i can is only imlement a counter imag or smth like that. i try to use generated image. thx for answers.

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