On Mon, 7 Jul 2003 21:07:14 +0100, you wrote:

>check sessions
>if session is not set
>check cookie
>if cookie is not set
>if ip is not set
>do a reverse ip check
>if that too comes clean then allow the person a vote
>as you can see i am trying my best to make sure that the visitor only votes
>once, if he/she changes machines this wont work of course but as far as i
>can see this should take care of around 99% of the visitors and allow a fair
>voteing system...

What happens when many users are behind a single proxy? Or two people log on
to the same machine?

Just go with the cookie, and recognise that ballot stuffing is inevitable
without user authentication, IMO.

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