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More Proxies

Posted: Fri Aug 18, 2006 2:40 pm
by s.dot
#1. Is it possible for a proxy to be a dynamic proxy? IE: changing it's IP with each page request?
#2. Is it possible to determine whether or not a person is using a proxy? Perhaps by checking against a db of known proxies? Or some function?
#3. I want to ban all people from referring people who use proxies. While sometimes it may be a valid referral, 90% of the time it is not.

I imagine I can go about this if #1 is false and #2 is true :)

Re: More Proxies

Posted: Fri Aug 18, 2006 2:49 pm
by feyd
  1. Yes, it's possible. See here.
  2. If a proxy wants to shadow its users, they can completely hide that they are a proxy. Although you can weed out the larger proxies with a lookup, there are thousands of smaller proxies out there that likely aren't on well known lists. There are several request headers that are available either in $_SERVER or in $_ENV or via getenv(). search.php?search_keywords=%2Aforwarded%2A
  3. ok

Posted: Fri Aug 18, 2006 3:02 pm
by s.dot
Seems as if my best bet is to just make sure the referred user does X amount of activity before counting them as a referral. Bah humbug, I wanted to be lazy!