Limit 1 vote per IP Address?

Question

What I really want is to limit 1 vote per person but the next best thing i can think of is limit 1 vote per IP address to prevent malicious users/hackers from severely tempering with my company's voting system. I was thinking of using a database to keep track of the IP addresses.

Update: Sorry about not being clear in the first time aruond. What i wanted to know if limiting 1 vote per IP address was a good strategy to limiting 1 vote per person. Basically, i wanted to know if 1 unique IP address is roughly equal to 1 person. People have already mentioned that proxies and routers re-use ip addresses so unfortunately, many people can be using the same ip address.

Thanks. I think, for my case, it'll be best to NOT limit 1 vote per ip address.

Answer 1

Yes, use database. Don't rely on cookies, they can be easily deleted.
IMO, so far, IP based voiting limitation is the best option.