Tracking IP Addresses
Written by Eric Smith, Northstar Computer Systems LLC
One of the server variables that you have available to you through the Request object is the IP address, stored in the REMOTE_ADDR variable. However, this won't always be a unique value. If you have visitors hitting your site through a firewall or proxy server, you'll only see the IP address of the proxy server. This also means that multiple users from the same site will have the same numeric address. This makes it a bit more difficult to use IP address in validation. I typically will ignore this value and use other values to validate a user's identity.
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Publication Date: 2/10/2001
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