I'm not sure there is any kind of standard for HTTP_X_FORWARDED_FOR...
I think all the X headers are "user-defined"
I believe you're at the mercy of whomever defined the masquereding server.
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----- Original Message -----
From: Tobias Strauß <[EMAIL PROTECTED]>
Newsgroups: php.general
To: <[EMAIL PROTECTED]>
Sent: Sunday, September 09, 2001 2:20 AM
Subject: HTTP_X_FORWARDED_FOR
> On php.net I found this:
>
> When you use REMOTE_ADDR for getting the IP of the current user, sometimes
> you get the IP of the ISP Cache server.
> When this happens, the HTTP_X_FORWARDED_FOR is also set, it contains the
IP
> of the user.
> [...]
> Note that the X-Forwarded for header might contain multiple addresses,
comma
> separated, if the request was forwarded through multiple proxies.
> [...]
>
> My question is:
> If the X-Forwarded for header contains multiple addresses, comma
separated,
> where do I find the one of the user? (I which order does it contain the
> adresses?)
> Do I get the right order (from the last proxies (at the beginning) to the
> user itself (at the end)) when I do this:
> $ip_route = $HTTP_SERVER_VARS["REMOTE_ADDR"] . "," .
> $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
> So that I finally have a chronological sorted list (i know: a string that
> contains the comma seperated ip-addresses of the users way to me (if they
> were forwarded by the proxie))? Am I right?
>
> Thanks for any coments about this.
>
>
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